Anti-infective compounds

ABSTRACT

The present invention relates to 4H-pyrido[1,2-a]pyrimidin-4-one compounds and their use in the treatment of bacterial infections, in particular Tuberculosis.

CROSS REFERENCE TO A RELATED APPLICATION

This application is a continuation application of Ser. No. 12/999,095, filed Mar. 11, 2011, now U.S. Pat. No. 8,785,452; which is a National Stage Application of International Application Number PCT/EP2009/004379, filed Jun. 17, 2009; which claims the benefit of U.S. Provisional Application Ser. No. 61/132,285, filed Jun. 17, 2008; which are incorporated herein by reference in their entirety.

FIELD OF INVENTION

The present invention relates to small molecule compounds and their use in the treatment of bacterial infections, in particular Tuberculosis.

BACKGROUND OF THE INVENTION

Tuberculosis (TB) as a disease continues to result in millions of deaths each year. Inadequate use of chemotherapy has led to an increasing number of drug resistant cases. This situation is likely to worsen with the emergence of extremely resistant strains to all currently known drugs (Van Rie and Enarson, 2006). The internationally recommended TB control strategy, also referred to as directly observed short-course chemotherapy (DOTS), relies on a combination of five antibacterial agents to be taken for a protracted period of more than six months (http://www.who.int/tb/dots/en/). With the use of a mathematical model, taking into consideration treatment duration and TB dynamics, benefits of reduced treatment length were predicted to be substantial and likely to greatly contribute to a reduced global TB burden (Salomon et al., 2006).

Current chemotherapy consists of compounds that directly target Mycobacterium tuberculosis bacillus, either by neutralizing general information pathways and critical processes such as RNA polymerization and protein synthesis inhibition or by interfering with mycobacterial specific cell envelope synthesis. The most widely used dedicated anti-tubercular drugs isoniazid, ethionamide and pyrazinamide are pro-drugs that first require activation. As active forms, they demonstrate inhibitory activity on a wide range of mycobacterial targets, which have not yet been fully characterized. As for other chronic infectious diseases like human immunodeficiency virus, a multi-therapy approach, including drugs that target a wide range of critical features of M. tuberculosis, proved to be the most successful strategy to date. It is, thus, likely that a combination of current drug inhibitors, having different mechanisms of action against M. tuberculosis, will be the solution for the control of the disease.

The most challenging approaches for discovering new anti-TB drugs rely on screening for active compounds that target critical features essential for the survival of the bacillus. Although there is still a lack of understanding of the biological mechanisms behind tubercle bacillus persistence, i.e. the location and state of latent bacteria, in humans, M. tuberculosis is thought to reside in primary granulomas under hypoxic conditions (Lenaerts et al., 2007) as well as to hide within various types of cells (Houben et al., 2006; Neyrolles et al., 2006). The bacillus mainly localizes inside phagocytic cells, such as macrophages and dendritic cells, and it has clearly been established that the tubercle bacillus adopts a different phenotype in the host macrophage's phagosome compared to growth in extracellular conditions (Rohde et al., 2007; Schnappinger et al., 2003). Upon infection, an inflammatory response is induced, thereby initiating recruitment of T lymphocytes that release interleukins and cytokines, which in turn activate the infected macrophages to enable the destruction of the pathogen. Upon the appropriate trigger, the host macrophage is, thus, able to eliminate the invading bacillus. This is further supported by the fact that of the people that inhale M. tuberculosis, more than 95% percent do not develop the disease, suggesting that the human host response is sufficient in most cases to thwart M. tuberculosis induced pathogenesis. This gives rise to the hypothesis that small molecular compounds could mimic the immune cell response signals and induce the host cells to clear the mycobacteria.

Accordingly, it was an object of the present invention to develop a phenotypic cell-based assay suitable for high throughput screening that allows for the search of compounds that would prevent M. tuberculosis multiplication inside the host macrophage. Up to now, this type of investigation of the tubercle bacillus growth within host cells relied on colony forming units (CFUs) determination after host cell lysis followed by serial dilutions and a 3-week incubation period required for bacterial growth on agar plates. Luciferase-expressing mycobacteria have been shown to be efficient in reducing the experiment duration, although cell lysis and luciferin substrate addition steps are still required (Arain et al., 1996). Also, these types of experiments are not easily amenable to large scale screening.

It was another object of the present invention to identify compounds effective against bacterial infections, in particular compounds that would prevent M. tuberculosis multiplication inside the host macrophage.

DESCRIPTION OF THE INVENTION

In one aspect, the present invention relates to compounds having the general formula VIII:

wherein

m is 0, 1, 2, or 3;

X₃ is selected from the group comprising CH₂, O, S and NH;

X₄ is selected from the group comprising halide, alkyl, OR₂₃, SR₂₄ and NR₂₅R₂₆;

R₂₀ is selected from the group comprising acyl, alkoxy, alkyl, alkylamino, alkylcarboxylic acid, arylcarboxylic acid, alkylcarboxylic alkylester, alkylene, alkylether, alkylhydroxy, alkylthio, alkynyl, amido, amino, aryl, arylalkoxy, arylamino, arylthio, carboxylic acid, cyano, cycloalkyl, carboxylic acid, ester, halo, haloalkoxy, haloalkyl, haloalkylether, heteroaryl, heteroarylamino, heterocycloalkyl and hydrogen, any of which is optionally substituted;

R₂₁ and R₂₂ are each independently selected from the group comprising alkoxy, alkyl, alkylamino, alkylene, alkylether, alkylthio, alkynyl, amido, amino, aryl, arylether, arylalkoxy, arylamino, arylthio, carboxy, cyano, cycloalkyl, ester, halo, haloalkoxy, haloalkyl, heteroaryl, heteroarylamino, heterocycloalkyl, hydroxyl, hydrogen, nitro, thio, sulfonate, sulfonyl and sulfonylamino, any of which is optionally substituted;

R₂₃ is selected from the group comprising acyl, alkyl, alkylamino, alkylene, alkynyl, aryl, arylalkoxy, arylamino, arylthio, carboxy, cycloalkyl, ester, ether, haloalkyl, heteroaryl, heteroarylamino, heterocycloalkyl, hydrogen, thio, sulfonate, and sulfonylamino, any of which is optionally substituted;

R₂₄ is selected from the group comprising alkyl, alkylaryl, alkylene, alkynyl, aryl, cycloalkyl, ester, halo, haloalkyl, heteroaryl, heterocycloalkyl, and hydrogen, any of which is optionally substituted; and

R₂₅ and R₂₆ are each independently selected from the group comprising acyl, alkyl, aminoalkyl, alkylene, alkylthio, alkynyl, aryl, arylalkoxy, arylamino, arylthio, carboxy, cycloalkyl, ester, ether, halo, haloalkoxy, haloalkyl, haloalkylether, heteroaryl, heteroarylamino, heterocycloalkyl and hydrogen, any of which is optionally substituted.

In general, the term “optionally substituted” as used herein is meant to indicate that a group, such as alkyl, alkylen, alkynyl, aryl, cycloalkyl, heterocycloalkyl, or heteroaryl, may be unsubstituted or substituted with one or more substituents. “Substituted” in reference to a group indicates that a hydrogen atom attached to a member atom within a group is replaced.

In another aspect, the present invention relates to compounds having the general formula VIIIa:

wherein

X₅ is selected from the group comprising CH₂, C═O and C═S;

Z₁ and Z₂ are each independently selected from the group comprising alkoxy, alkyl, alkylamino, alkylene, alkylether, alkylthio, alkynyl, amido, amino, aryl, arylether, arylalkoxy, arylamino, arylthio, carboxy, cyano, cycloalkyl, ester, halo, haloalkoxy, haloalkyl, heteroaryl, heteroarylamino, heterocycloalkyl, hydroxyl, and hydrogen, or two groups are connected each other to make five or six membered cyclic, heterocyclic and heteroaryl rings, any of which is optionally substituted;

R₂₇ and R₂₈ are each independently selected from the group comprising alkoxy, alkylamino, alkylene, alkylether, alkylthio, alkynyl, amido, amino, aryl, arylether, arylalkoxy, arylamino, arylthio, carboxy, cyano, cycloalkyl, ester, halo, haloalkoxy, haloalkyl, heteroaryl, heteroarylamino, heterocycloalkyl, hydroxyl, hydrogen, nitro, thio, sulfonate, sulfonyl and sulfonylamino, any of which is optionally substituted;

R₂₉ and R₃₀ are each independently selected from the group comprising alkoxy, alkyl, alkylamino, alkylene, alkylether, alkylthio, alkynyl, amido, amino, aryl, arylether, arylalkoxy, arylamino, arylthio, carboxy, cyano, cycloalkyl, ester, halo, haloalkoxy, haloalkyl, heteroaryl, heteroarylamino, heterocycloalkyl, hydroxyl, hydrogen, nitro, thio, sulfonate, sulfonyl and sulfonylamino, or two groups are connected each other to make five or six membered cyclic, heterocyclic, aryl, and heteroaryl rings, any of which is optionally substituted.

The term “alkyl” as used herein is meant to indicate that a group, such as substituted or non-substituted C₁-C₁₀ alkyl group which has the straight or branched chain.

The term “cycloalkyl” as used herein is meant to indicate that a group, such as substituted or non-substituted cyclic compound of C₃-C₈ ring structure.

The term “heteroaryl” as used herein is meant to indicate that a group, such as substituted or non-substituted 5- to 9-membered aromatic compounds which have more than one heteroatom of N, O, and S in the ring structure itself.

The term “optionally substituted” as used herein is meant to indicates that a hydrogen atom attached to a member atom within a group is possibly replaced by group, such as C₁-C₁₀ alkyl, halogen including fluorine, OH, NO₂, OR₃₁, CN, NR₃₁R₃₂, COR₃₁, SOR₃₂, SO₂R₃₁, SO₂NR₃₁, CR₃₁═CR₃₁R₃₂, CR₃₁═NR₃₂, aryl, aryloxy, C₄-C₁₀ heteroaryl group, or —NR₃₁—COR₃₂, —O—COR₃₁.

R₃₁ and R₃₂ are each independently selected from the group comprising hydrogen, alkyl, alkyloxy, alkylamino, alkylcarbonyl, alkylcarbonylamino, alkylcarbonyloxy, alkylaminocarbonyl, alkyloxycarbonyl, cycloalkyl, cycloalkyloxy, cycloalkylamino, cycloalkylcarbonyl, cycloalkylcarbonylamino, cycloalkylcarbonyloxy, cycloalkylaminocarbonyl, cycloalkyloxycarbonyl, heteroaryl, heteroaryloxy, heteroaryl amino, heteroaryl carbonyl, heteroaryl carbonylamino, heteroaryl carbonyloxy, heteroaryl aminocarbonyl, heteroaryl oxycarbonyl, heteroaryl alkyl, heteroaryl alkyloxy, heteroaryl alkylamino, heteroaryl alkylcarbonyl, heteroaryl alkylcarbonylamino, heteroaryl alkylcarbonyloxy, heteroaryl alkylaminocarbonyl, heteroaryl alkyloxycarbonyl, phenyl, phenyloxy, phenylamino, phenylcarbonyl, phenylcarbonylamino, phenylcarbonyloxy, phenylaminocarbonyl, and phenyloxycarbonyl, any of which is optionally substituted.

In another aspect, the present invention relates to compounds having one of the formulas 125-301 as shown in Example 7, preferably 132-135, 137, 139-140, 147, 151-152, 160, 163, 173, 180, 184-185, 193, 195, 199-201, 204, 206-222, 224, 226, 229, 231-243, 245-278, 280-286 and 290-301 as shown in Table 3. Particularly preferred compounds are compounds having one of the formulas 133, 232 and 264 as shown in Table 3.

In one aspect, the present invention relates to compounds having the general formula II:

wherein

R₅ and R₆ are each independently selected from the group comprising acyl, alkyl, alkylamino, alkylene, alkylthio, alkynyl, aryl, arylalkoxy, arylamino, arylthio, carboxy, cycloalkyl, ester, haloalkoxy, haloalkyl, heteroaryl, heteroarylamino, heterocycloalkyl, hydroxyl, hydrogen, sulfonate and sulfonyl, any of which is optionally substituted and

R₇, R₈ and R₉ are each independently selected from the group comprising alkoxy, alkyl, alkylamino, alkylene, alkylthio, alkynyl, amido, amino, aryl, arylalkoxy, arylamino, arylthio, carboxy, cyano, cycloalkyl, ester, halo, haloalkoxy, haloalkyl, heteroaryl, heteroarylamino, heterocycloalkyl, hydroxyl, hydrogen, nitro, thio, sulfonate, sulfonyl and sulfonylamino, any of which is optionally substituted.

In another aspect, the present invention relates to compounds with the general formula II, wherein R₅ and R₆ are connected, having the general formula IIa:

wherein

n is 0, 1, 2, or 3;

Y and Z are each independently selected from the group comprising CH₂, CHOR₁₀, CHNR₁₀R₁₁, CR₁₀R₁₁ and NR₁₀; and

R₁₀ and R₁₁ are each independently selected from the group comprising acyl, alkyl, alkylamino, alkylene, alkylthio, alkynyl, aryl, arylalkoxy, arylamino, arylthio, carboxy, cycloalkyl, ester, haloalkoxy, haloalkyl, heteroaryl, heteroarylamino, heterocycloalkyl, hydrogen, sulfonate and sulfonyl, any of which is optionally substituted.

In another aspect, the present invention relates to compounds having one of the formulas with the general formula/scaffold II as shown in FIGS. 9-1 to 9-41, as well as one of the formulas 1-123 as shown in Example 6, preferably 1-24, 26-34, 54, 56, 58-61, 63-64, 67, 90-101, 103-105, 107-109, 112, 114-116 and 118-121 as shown in Table 3. Particularly preferred compounds are compounds having one of the formulas 4 and 24 as shown in Table 3.

Preferably, the compounds as defined above have an inhibitory activity, preferably an inhibitory activity above 65%, on bacterial growth, preferably on the growth of M tuberculosis, inside a host cell, preferably a macrophage, at a concentration between 5-20 μM, preferably less than 5 μM.

In one aspect, the present invention relates to compounds as defined above for use in the treatment of bacterial infections.

In one aspect, the present invention relates to compounds as defined above for use in the treatment of Tuberculosis.

In one aspect, the present invention relates to a pharmaceutical composition comprising a compound as defined above.

In one aspect, the present invention relates to a method of treatment of Tuberculosis, comprising the application of a suitable amount of a compound as defined above to a person in need thereof.

In another aspect, the present invention relates to compounds having one of the general formulas/scaffolds I, III-VII and IX-XX as shown in Table 2.

In one aspect, the present invention relates to compounds having the general formula I:

wherein

X₁ and X₂ are each independently selected from the group comprising CH and NH;

R₁ and R₂ are each independently selected from the group comprising alkoxy, alkyl, alkylamino, alkylene, alkylthio, alkynyl, amido, amino, aryl, arylalkoxy, arylamino, arylthio, carboxy, cyano, cycloalkyl, ester, halo, haloalkoxy, haloalkyl, heteroaryl, heteroarylamino, heterocycloalkyl, hydroxyl, hydrogen, nitro, thio, sulfonate, sulfonyl and sulfonylamino, any of which is optionally substituted; and

R₃ and R₄ are each independently selected from the group comprising alkoxy, alkyl, alkylamino, alkylene, alkylthio, alkynyl, aryl, arylalkoxy, arylamino, arylthio, cyano, cycloalkyl, haloalkoxy, haloalkyl, heteroaryl, heteroarylamino, heterocycloalkyl and hydrogen, any of which is optionally substituted.

In one aspect, the present invention relates to compounds having the general formula III:

wherein

R₁₀ and R₁₁ are each independently selected from the group comprising alkoxy, alkyl, alkylamino, alkylene, alkylthio, alkynyl, amido, amino, aryl, arylalkoxy, arylamino, arylthio, carboxy, cyano, cycloalkyl, ester, halo, haloalkoxy, haloalkyl, heteroaryl, heteroarylamino, heterocycloalkyl, hydroxyl, hydrogen, nitro, thio, sulfonate, sulfonyl and sulfonylamino, any of which is optionally substituted.

In another aspect, the present invention relates to compounds having the general formula IV:

wherein

A is an optionally substituted heteroaryl, naphthyl and phenyl and

R₁₂ is selected from the group comprising alkoxy, alkyl, alkylamino, alkylene, alkylthio, alkynyl, amido, amino, aryl, arylalkoxy, arylamino, arylthio, carboxy, cyano, cycloalkyl, ester, halo, haloalkoxy, haloalkyl, heteroaryl, heteroarylamino, heterocycloalkyl, hydroxyl, hydrogen, nitro, thio, sulfonate, sulfonyl and sulfonylamino, any of which is optionally substituted.

In one aspect, the present invention relates to compounds having the general formula V:

wherein

R₁₃, R₁₄ and R₁₅ are each independently selected from the group comprising alkoxy, alkyl, alkylamino, alkylene, alkylthio, alkynyl, amido, amino, aryl, arylalkoxy, arylamino, arylthio, carboxy, cyano, cycloalkyl, ester, halo, haloalkoxy, haloalkyl, heteroaryl, heteroarylamino, heterocycloalkyl, hydroxyl, hydrogen, nitro, thio, sulfonate, sulfonyl and sulfonylamino, any of which is optionally substituted.

In another aspect, the present invention relates to compounds having the general formula VI:

wherein

R₁₆ is selected from the group comprising alkoxy, alkyl, alkylamino, alkylene, alkynyl, amino, aryl, arylalkoxy, arylamino, arylthio, cycloalkyl, haloalkoxy, haloalkyl, heteroaryl, heteroarylamino, heterocycloalkyl, hydroxyl and hydrogen, any of which is optionally substituted and

R₁₇ is selected from the group comprising alkoxy, alkyl, alkylamino, alkylene, alkylthio, alkynyl, amido, amino, aryl, arylalkoxy, arylamino, arylthio, carboxy, cyano, cycloalkyl, ester, halo, haloalkoxy, haloalkyl, heteroaryl, heteroarylamino, heterocycloalkyl, hydroxyl, hydrogen, nitro, thio, sulfonate, sulfonyl and sulfonylamino, any of which is optionally substituted.

In one aspect, the present invention relates to compounds having the general formula VII:

wherein

R₁₈ and R₁₉ are each independently selected from the group comprising alkoxy, alkyl, alkylamino, alkylene, alkylthio, alkynyl, amido, amino, aryl, arylalkoxy, arylamino, arylthio, carboxy, cyano, cycloalkyl, ester, halo, haloalkoxy, haloalkyl, heteroaryl, heteroarylamino, heterocycloalkyl and hydrogen, any of which is optionally substituted.

In another aspect, the present invention relates to compounds having one of the formulas with the general formulas I, III-VII and IX-XX as shown in FIGS. 9-1 to 9-41.

In one aspect, the present invention relates to a compound listed in Table 1.

In one aspect, the present invention relates to compounds as defined above for use in the treatment of bacterial infections.

In one aspect, the present invention relates to compounds as defined above for use in the treatment of Tuberculosis.

In one aspect, the present invention relates to a pharmaceutical composition comprising a compound as defined above.

In one aspect, the present invention relates to a method of treatment of Tuberculosis, comprising the application of a suitable amount of a compound as defined above to a person in need thereof.

In another aspect, the present invention relates to a screening method comprising the steps of

(a) batch infection of host cells with fluorescently labeled M. tuberculosis mycobacteria; (b) removing free unbound mycobacteria; (c) adding compounds that are to be tested to a multi-well plate; (d) seeding said host cells infected with fluorescently labeled M. tuberculosis mycobacteria into said multi-well plate containing said compounds; (e) incubating said multi-well plate containing host cells infected with fluorescently labeled M. tuberculosis mycobacteria and said compounds; (f) fluorescently labeling said host cells; (g) analyzing said multi-well plate using automated confocal microscopy.

The screening method according to the present invention represents a phenotypic cell-based assay enabling the search for drugs that interfere with the multiplication of M. tuberculosis within host macrophages. The assay makes use of fluorescently labeled living macrophages infected with fluorescently labeled mycobacteria and uses automated confocal fluorescence microscopy to measure intracellular mycobacterial growth. The assay has been set-up for the high throughput screening (HTS) of large scale chemical libraries.

BRIEF DESCRIPTION OF THE FIGURES AND TABLES

Reference is now made to the figures and tables, wherein

FIG. 1 shows the monitoring of tubercle bacillus intracellular growth inside macrophages by automated confocal microscopy: (a) Representative pictures of Raw264.7 cells infected with M. tuberculosis H37Rv-GFP at different time points after infection. (b) Image analysis: 1: Typical 2-color image; 2: Circled object corresponds to detected cells; 3: Circled object corresponds to bacterial aggregates; 4: Filled purple cells correspond to infected cells. (c,d,e) Image-based quantification of the percentage of infected cells and the mean number of cells from 2 hours to day 7 after infection with H37Rv-GFP at a multiplicity of infection of 0.5 (gray square), 1 (black circle) and 2 (dark gray triangle). Non-infected cells (black diamonds) were used as the negative control;

FIG. 2 shows the pharmacological validation and MIC (minimal inhibitory concentration) comparison of the reference drugs in the in vitro growth fluorescence assay and the phenotypic cell-based assay: (a) Representative pictures of infected cells in presence of INH at 1 μg/mL or DMSO control. (b,c,d) Dose-response of INH, rifampin and ethionamide; black square and line corresponds to growth inhibition in cell-based assay; gray circle and line correspond to in vitro growth inhibition; shown is a representative data set;

FIG. 3 shows assay automation validation of the phenotypic cell-based assay: (a) Percent of M. tuberculosis infected cells relative to 384-plate well-index. Black square, dark gray square, gray square and open square correspond to INH 1 μg/mL, rifampin 5 μg/mL, PBS and DMSO control respectively. (b,c) Percent of M. tuberculosis infected cells relative to INH and rifampin concentration. Experiments were performed on four different plates on two independent days;

FIG. 4 shows primary screening results for the phenotypic cell-based assay and the in vitro growth assay for 26500 compounds: (a) Percent inhibition based on infection ratio relative to each compound and distribution. (b) Percent inhibition based on RFU relative to each compound and distribution. (c) Comparison of inhibition percentage for the phenotypic cell-based assay and the in vitro growth assay for each compound;

FIG. 5 shows serial dilution results from the in vitro growth fluorescence assay and the phenotypic cell-based assay: Typical curves for compounds inhibiting (a,b,c) in vitro bacterial growth (d,e,f) both in vitro and intracellular growth and (g,h,i) intracellular growth only. (a,d,g) Infection ratio relative to compound concentration. (b,e,h) Cell number relative to compound concentration. (c,f,i) Relative fluorescence intensity relative to compound concentration. Compound concentration is given in M;

FIG. 6 shows (a) a scheme of assay automation. (b) a 384-plate format description; (c) a 384-plate dose-response curve description. A to P and a to b correspond to 2-fold serial dilution of INH and Rifampin respectively with a starting concentration of 20 mg/mL in well A or a; RIF: Rifampin 5 μg/mL, Cpd: compound, INH100 1 μg/mL, INH50 0.05 μg/mL;

FIG. 7 shows the anti-tuberculosis effect of compounds 4 and 24 (5 μM) on M. tuberculosis H37Rv-GFP in (a) Raw267.4 (10⁴ cells), (b) mouse bone marrow-derived macrophages and (c) human primary macrophages differentiated with 50 ng/mL rhM-CSF (1.5*10⁴) after 7 days of infection with MOI 2.5:1 (control INH at 5 μM);

FIG. 8 illustrates the colony forming units (CFUs) recovered from macrophages at different time points after infection with M. tuberculosis H37Rv. Either Raw264.7 cells (a) or murine BMDM (b) were infected at an MOI of 1:1 and treated with the indicated amount of pyridopyrimidione compound 232 (20 μM) with DMSO, INH (10 μM) and RIF (10 μM) as controls;

FIGS. 9-1 to 9-41 list 121 compounds which demonstrated an inhibitory activity above 65% at 2 μM without any apparent cell toxicity at 20 μM and consequently were selected for further confirmation by ten 3-fold serial dilutions;

Table 1 lists 340 hits whose inhibitory activity was confirmed in an intracellular (QIM) assay or an in vitro (QUM) assay, wherein the abbreviation “QIM” stands for Quantification of Intracellular Mycobacteria, the abbreviation “QUM” stands for Quantification of in vitro grown Mycobacteria, and the abbreviation “CellNb” stands for cell number;

Table 2 summarizes the independent/general molecular scaffolds/formulas of the 121 hits listed in FIGS. 9-1 to 9-41;

Table 3 lists dinitrobenzamide and pyridopyrimidinone derivatives (general scaffold II and VIII, respectively, see Table 2) with their respective inhibitory activities, wherein the numbers in bold print refer to the compounds listed in Examples 6 and 7;

Table 4 shows the cytotoxicity and antibacterial spectrum of dinitrobenzamide compounds 4 and 24 (see Table 3);

Table 5 shows the cytotoxicity and antibacterial spectrum of pyridopyrimidinone compound 133 (see Table 3); and

Table 6 shows the frequency of spontaneous resistance for representative dinitrobenzamide and pyridopyrimidinone compounds.

EXAMPLES

The invention is now further described by reference to the following examples which are intended to illustrate, not to limit the scope of the invention.

Materials and Methods Genetic Constructs and Mycobacterial Strains

A recombinant strain of M. tuberculosis H37Rv expressing the green fluorescent protein (H37Rv-GFP) was obtained by transformation of an integrative plasmid (Abadie et al., 2005; Cremer et al., 2002). Within this plasmid, which is derived from the Ms6 mycobacteriophage, the gfp gene is cloned and constitutively expressed under the strong mycobacterial promoter pBlaF. Electrocompetent cells for M. tuberculosis H37Rv-GFP were prepared from 400 mL of a 15 days old Middlebrook 7H9 culture (Difco, Sparks Md., USA) supplemented with albumin-dextrose-catalase (ADC, Difco, Sparks Md., USA), glycerol and 0.05% Tween 80. Bacilli were harvested by centrifugation at 3000 g for 20 min, washed twice with H₂O at room temperature, and resuspended in 1-2 mL of 10% glycerol at room temperature after recentrifugation. 250 μl of bacilli were mixed with green fluorescent protein encoding plasmid and electroporated using a Biorad Gene Pulser (Biorad). After electroporation, bacilli were resuspended in medium and left one day at 37° C. Transformants were selected on Middlebrook 7H11 medium (Difco, Sparks Md., USA) supplemented with oleic acid-albumin-dextrose-catalase (OADC, Difco, Sparks Md., USA) and 50 μg/mL hygromycin (Invitrogen, Carlsbad, Calif. USA). The selected hygromycin-resistant and green fluorescent colonies appeared after 3 weeks. A 100 mL culture of the H37Rv-GFP strain was grown in Middlebrook 7H9-ADC medium supplemented with 0.05% Tween 80 and 50 μg/mL of hygromycin. Bacteria were harvested, washed twice and suspended in 50 mM sodium phosphate buffer (pH 7.5). The bacteria were then sonicated and allowed to stand for 1 hour to allow residual aggregates to settle. The bacterial suspensions were then aliquoted and frozen at −80° C. A single defrosted aliquot was used to quantify the CFUs (colony forming units) prior to inoculation and typical stock concentrations were about 2 to 5×10⁸ CFU/mL.

Host Cells

Mouse macrophage cell lines Raw 264.7 (ATCC #TIB-71), J774A.1 (ATCC #TIB-67) or human monocytes (ATCC #TIB-202) differentiated with 50 ng/mL PMA (Sigma) were grown in RPMI 1640 (Gibco) with 10% heat-inactivated fetal calf serum (Gibco).

Chemical Compounds

The small synthetic molecules from the screening libraries were suspended in pure DMSO (Sigma, D5879-500 mL) at a concentration of 10 mM (Master plates) in Corning 96 well clear V-bottom polypropylene plates (Corning, #3956). The compounds were then reformatted in Greiner 384 well V-shape polypropylene plates (Greiner, #781280) and diluted to a final concentration of 2 mM in pure DMSO. The compounds were kept frozen until use. For screening, compound plates were incubated at room temperature until thawed. The compounds were directly added into the assay plates from the DMSO stock using an EVObird liquid handler (Evotec Technologies), which transfers 250 n1 of compound twice to reach a final dilution of 1:100. This one-step dilution reduces the risk of compound precipitation in intermediate plates and allows for a low final DMSO concentration (1%).

Positive control antibiotics (Isoniazid (Sigma, 13377-50G) and Rifampin (Euromedex, 1059-8, 5 g)) as well as negative controls (DMSO) were added manually in each plate in columns 1-2 and 23-24 (see FIG. 6 b for plate description).

A total of 26500 compounds were tested. These compounds came from commercial libraries from Timtec (25000 from the ActiProbe diverse library, 1000 from the Kinase inhibitors ActiTargK library and 500 from the Protease inhibitors ActitargP library). The screened compounds were selected based on high diversity and drug-like properties (using Lipinski rule-of-five (Lipinski et al., 2001)). They were first screened at one concentration (primary screen, concentration=20 μM). The “positive” compounds selected from the primary screen were then confirmed by testing at 3 concentrations (20, 2 and 0.2 μM) to identify the most active and/or by ten 3-fold ten dilutions (from 20 μM to 0.5 nM).

Macrophage Invasion Assay Set-Up

Cells were first seeded in 50 μl at a density of 20,000 cells per well of a 384-well plate (Evotec technologies #781058) for 16 hours and then infected with bacterial suspensions at a multiplicity of infection (MOI) varying from 10:1 to 1:1 (bacteria:host cells). After 2 hours, cells were washed three times with phosphate buffered saline (PBS) and the compounds diluted in fresh culture medium were added. Cells were incubated at 37° C., 5% CO₂ for up to seven days.

Macrophage Batch Infection Assay Scale-Up

Cells (1.5×10⁸ cells) were infected with H37Rv-GFP suspension at a MOI of 1:1 in 300 mL for 2 hours at 37° C. with shaking (100 rpm). After two washes by centrifugation at 1100 rpm (Beckman SX4250, 165 g) for 5 min., the remaining extracellular bacilli from the infected cells suspension were killed by a 1 hour amykacin (20 μM, Sigma, A2324-5G) treatment. After a final centrifugation step, cells were dispensed with the Wellmate (Matrix) into 384-well Evotec plates (#781058) preplated with 10 μl of the respective compound diluted in cell medium. Infected cells were then incubated in the presence of the compound for 5 days at 37° C., 5% CO₂. After five days, macrophages were stained with SYTO 60 (Invitrogen, S11342) followed by plate sealing and image acquisition. During screening, staining of the live cells was carried out on a set of three plates every two hours to limit cell death due to prolonged incubation with cell chemical stain.

Image Acquisition and Data Analysis

Confocal images were recorded on an automated fluorescent confocal microscope Opera™ (Evotec Technologies) using a 20×-water objective (NA 0.70), 488-nm and 635-nm lasers and a 488/635 primary dichroic mirror. Each image was then processed using dedicated in-house image analysis software (1M). Parameters determined were the total cell number and the number of infected cells. Briefly, the algorithm first segments the cells on the red channel using a sequence of processing steps as described elsewhere (Fenistein et al., manuscript in press). It is generally based on a succession of 1) thresholding the histogram of the original image (3 classes K-means) 2) gaussian filtering the original image with a standard deviation that is set equal to the cells' average radius, 3) searching for the local maxima of the filtered image that provides cell centers as seeds for 4) region growing that defines each cell's own surface and finally 5) removing extremely small cells as potential artifacts or noise. This step provides the total number of cells in the red channel. Infected cells are then defined as those having at least a given number of pixels (usually 3) whose intensity in the green channel is above a given intensity threshold. The ratio of infected cells to the total number of cells is the measure of interest (named infection ratio). For each well, 4 pictures were recorded and for each parameter, the mean of the four images was used.

Data obtained from either the intracellular assay image analysis or from the conventional antibacterial assay (see below) were then processed using ActivityBase (IDBS) to calculate the statistical data (% of inhibition, Z score for each compound, Z′, CV etc. for the control plates) and to store the data in an Oracle database. Additional analyses with regards to both quality control of the screens and hit identification were performed with various software packages including Spotfire (Tibco) and Pipelinepilot (Accelrys).

In Vitro Aerobic Bacterial Growth Assay

A frozen aliquot of M. tuberculosis H37Rv-GFP was diluted at 1.5×10⁶ CFU/mL in Middlebrook 7119-ADC medium supplemented with 0.05% Tween 80. Greiner μclear-black 384-well plates (Greiner, #781091) were first preplated with 0.5 μl of compound dispensed by EVOBird (Evotec) in 10 μl of Middlebrook 7H9-ADC medium supplemented with 0.05% Tween 80. 40 μl of the diluted H37Rv-GFP bacterial suspension was then added on top of the diluted compound resulting in a final volume of 50 μl containing 1% DMSO. Plates were incubated at 37° C., 5% CO₂ for 10 days after which GFP-fluorescence was recorded using a Victor 3 reader (Perkin-Elmer Life Sciences).

Macrophage Infection Assay and Image Analysis

Raw 264.7 (ATCC #TIB-71) (1.5*10⁸ cells) were infected with H37Rv-GFP (Abadie et al., 2005, Cremer et al., 2002) in suspension at a MOI of 1:1 for 2 hours at 37° C. with shaking. After two washes by centrifugation, the remaining extracellular bacilli from the infected cell suspension were killed by a 1 hour Amikacin (20 μM. Sigma, A2324) treatment. After a final centrifugation step, cells were dispensed into 384-well Evotec plates (#781058) preplated with compounds and controls. Infected cells were then incubated for 5 days at 37° C., 5% CO₂. Murine Bone Marrow-Derived Macrophages (BMDM) were produced as described previously (Brodin et al., 2006). Briefly, cells were extracted from the femurs and tibia of 6 weeks old female mice (C57BL/6, Orientbio) and cultivated in RPMI 1640 media containing 10% heat-inactivated fetal calf serum (FCS) (both from Gibco® at Invitrogen, Carlsbad, Calif.) and 10% L-929 cell conditioned medium. Peripheral Blood Mononuclear Cells (PBMC) were isolated from Buffy coat from healthy volunteers. Buffy coat diluted in PBS supplemented with 1% FCS was treated with 15 ml of Ficoll-Paque Plus (Amersham Biosciences, Sweden) and centrifuged at 2500×g for 20 min. PBMC were obtained by CD14⁺ bead separation (Miltenyi Biotec, Germany), washed 3-times with PBS (1% FCS) and transferred to 75 cm² culture flasks containing RPMI 1640 media, 10% FCS and 50 ng/ml of recombinant-human macrophage colony stimulating factor (R & D systems, Minneapolis). Six day old adherent murine BMDM and PBMC derived human macrophages were infected with H37Rv-GFP (Abadie et al., 2005) in suspension at a MOI of 1:1 for 2 hours at 37° C. and then extensively washed and finally incubated with compounds or controls. After several days, macrophages were stained with SYTO 60 (Invitrogen, S11342) and image acquisition was performed on an EVOscreen-MarkIII fully automated platform (PerkinElmer) integrated with an Opera™ (20×-water objective, NA 0.70) and located in a BSL-3 safety laboratory. Mycobacteria-GFP were detected using a 488-nm laser coupled with a 535/50 nm detection filter and cells labeled with a 635-nm laser coupled with a 690/40 nm detection filter. Four fields were recorded for each plate well and each image was then processed using dedicated in-house image analysis software (IM) as described elsewhere (Fenistein et al., in press).

Mycobacterial Strains and In Vitro Bacterial Growth Assay

Mycobacterium tuberculosis H37Rv, H37Ra and BCG Pasteur were used as reference strains. All strains were diluted at 1.5×10⁶ CFU/mL in Middlebrook 7H9-ADC medium supplemented with 0.05% Tween 80. 384-well plates (Greiner, #781091) were first preplated with 0.5 μl of compound dispensed by EVOBird (Evotec) in 10 μl of Middlebrook 7H9-ADC medium supplemented with 0.05% Tween 80. Forty microliters of the diluted H37Rv-GFP bacterial suspension was then added to the diluted compound resulting in a final volume of 50 μl containing 1% DMSO. Plates were incubated at 37° C., 5% CO₂ for 10 days. Mycobacterial growth was determined by measuring GFP-fluorescence using a Victor 3 reader (Perkin-Elmer Life Sciences) for H37Rv-GFP or with resazurin method. Isoniazid at 0.05 μg/mL and 1 μg/mL (Sigma, 13377), Rifampin at 1 μg/mL (Euromedex) and DMSO were used as controls.

Cytotoxicity Assay

In order to address compound toxicity, seven cell lines originating from different body tissues were cultivated in the presence of 3-fold dilutions of compounds starting from 100 μM. After 5 days of culture, cell viability was assessed by the resazurin test. Briefly, cells were incubated with 10 μg/mL of resazurin (Sigma-Aldrich St. Louis, Mo.) for 4 h at 37° C. under 5% CO₂. Resofurin fluorescence (RFU) was measured as indicated above. Percentage of toxicity on cells was calculated as follows: Cytotoxicity (%)=(RFU_(DMSO)−RFU_(Blank))−(RFU_(compound)−RFU_(blank))/(RFU_(DMSO)−RFU_(Blank))×100. Percentage of cytotoxicity was plotted against compound concentration and the minimal toxic concentration (MTC₅₀) was determined by non-linear regression analysis as the lowest compound concentration where fifty percent toxicity was observed on the corresponding cell line.

Frequency of Spontaneous Resistance

The frequency of spontaneous mutations was determined on 7H10 plates containing increasing concentrations of dintirobenzamide (0.2, 0.8, 1.6 and 3.2 μg/ml) or pyridopyrimidinone (0.4, 0.8, 1.6 and 3.2 μg/ml) compounds. 10⁶, 10⁷ and 10⁸ CFU containing bacterial suspensions were spread on compound containing agar plates. After 5-6 weeks at 37° C., colonies were counted and frequency of mutation was evaluated as the ratio of colonies relative to the original inoculum. DMSO and INH were used as negative and positive controls, respectively.

Example 1 Phenotypic Macrophage-Based Assay Set-Up and Automated Image Quantification

To set-up the optimal conditions of M. tuberculosis infection, Raw264.7 macrophages were first infected with mycobacteria that constitutively express green fluorescent protein (GFP) at different multiplicities of infection (MOI) followed by kinetic analysis. Up to 7 days post bacillus infection, the host live cells were daily labeled with the red chemical fluorescent dye Syto60, and confocal images of live samples were acquired using an automated confocal microscope. Typical images are displayed in FIG. 1 a. During the first 24 hours, a few discrete weakly fluorescent bacteria localized within the cells. By day 2, the average number of cells had increased and mycobacteria had started to spread into neighboring cells leading to zones of strongly fluorescent bacteria. The localization of the green signal is always within a distance of 5 μm to that of the red cell signal and in most cases actually overlaps with the cell signal. This confirms the intracellular nature of the mycobacteria growth. By day 4, the cell number has significantly diminished and the bacteria have formed large, highly fluorescent aggregates, which cover almost the entire image from day 5 onwards. As a control, non-infected cells grew up to confluence at day 2 and remained alive until day 7.

In order to automatically quantify the intracellular bacterial load, an in-house image analysis script was developed. This script enables the automated quantification of the number of cells and the percentage of infected cells, whereby an infected cell is a cell containing at least three green pixels with an intensity above a defined threshold (FIG. 1 b). 2 hours after infection, between 2 and 10% of Raw264.7 cells were found to harbor a low number of bacilli (FIG. 1 c). The percentage of infected cells, hereafter named infection ratio, continued to increase from 72 hours post-infection reaching up to 70% at seven days post infection. This increase in infection ratio correlated with an increase in cell mortality (FIG. 1 d/e).

Example 2 Comparative Minimal Inhibitory Concentration of Known Anti-Tubercular Drugs

To validate the assay set-up, the effect of current anti-tuberculosis drugs on M. tuberculosis intracellular growth was investigated. 2-fold serial dilutions of isoniazid (INH), rifampin and ethionamide were performed, followed by testing on macrophages that had previously been infected with M. tuberculosis H37Rv-GFP. After 5 days of incubation, macrophages were stained, and images acquired on an automated confocal microscope as described above. A larger number of cells and a fewer number of bacteria are clearly seen on pictures corresponding to samples that were incubated with INH compared to the DMSO negative control. This shows that INH prevents both intracellular M. tuberculosis growth and bacillus mediated cytotoxicity (FIG. 2 a). A clear inhibition dose-response curve was obtained by image-extracted analysis (FIG. 2 b). In parallel, inhibition of M. tuberculosis H37Rv-GFP in vitro growth by INH was monitored by recording green fluorescence intensity under the same conditions. In both experiments, the minimal inhibitory concentration (MIC) for INH was 0.1 μg/mL, which is in accordance with the MIC reported in the literature for extracellular M. tuberculosis growth (Andries et al., 2005). Similar results were obtained with the standard anti-tuberculosis drugs ethionamide (FIG. 2 c) and ethambutol (data not shown), whereas for rifampin, there was a log-fold decrease in the MIC in the cell-based assay compared to the in vitro assay (FIG. 2 d). The diminished efficacy of rifampin in the cell-based assay is likely due to impaired cell penetration and further demonstrates that it is the intracellular antibacterial activity that is being monitored in this assay. Thus, adaptation of both the intracellular and the in vitro M. tuberculosis growth assay for high throughput screening (HTS) was performed.

Example 3 Assay Scale-Up and Validation

To simplify the protocol for FITS purposes, macrophages were infected in batch with M. tuberculosis before being dispensed onto the compounds. The batch infection was carried out with macrophages in suspension at 37° C. under mild shaking. Free unbound mycobacteria were removed by washing three times with PBS and differential centrifugation, as well as by an additional one-hour incubation step with amykacin, an antibiotic known to selectively kill extracellular microbes (FIG. 6 a). M. tuberculosis infected macrophages were then seeded in plates that had been previously dispensed with the compounds, DMSO or antibiotic controls. The day-to-day as well as plate-to plate reproducibility was first tested. To this end, either serial dilutions of INH or rifampin were dispensed into 8 plates along with the regular DMSO and positive control (INH at 1 μg/mL (MIC100) and at 0.05 μg/mL (MIC90) and rifampin at 1 μg/mL) wells that were subsequently seeded with infected cells. The same experiment was repeated over 2 consecutive days. After incubation for 5 days and macrophage staining, pictures from each plate were acquired. The mean infection ratio determined for the DMSO negative controls in each plate for the 2 days of experiments was between 50% and 70%, whereas for the INH and rifampin samples, the mean infection ratio fell to below 20% (FIG. 3 a). Despite some variation in the mean infection ratio between the two experiments, the difference between the INH-positive and DMSO-negative controls was above five-fold for both days. P values calculated for each plate using a paired t-student test also confirmed a significant difference between the positive and negative controls (p<0.000001, data not shown). In addition, the inventors performed an experiment to determine if inhibitors of M. tuberculosis intracellular growth infection dispensed in any well on the plate could be detected by performing double-blind controls (spike of INH and rifampin at 3 different concentrations). Indeed, one hundred percent of the spikes were identified (data not shown). Taken together, these results prove that the assay is sensitive enough to be able to identify inhibitors under HTS conditions. Finally, the robustness of the assay was checked by monitoring the dose-response of reference compounds. Almost identical MICs for the antibiotic positive controls were determined independent of the plate or the day of the experiment (FIG. 3 b/c). Calculated MICs from the image based quantification of the infection ratio were 0.16+/−0.05 μg/mL and 2.4+/−1.3 μg/mL for INH and rifampin, respectively, and were confirmed by CFU plating (data not shown). In parallel, the extracellular growth assay was validated with a similar approach (data not shown).

Example 4 Primary Screening of a Large Library of Small Synthetic Compounds Using the Phenotypic Cell-Based Assay

A 26500 small molecule compound library, that was selected for its high chemical diversity and drug-like properties according to the Lipinski rules (Lipinski et al., 2001), was chosen as the first library to be screened using the validated phenotypic cell-based assay. The primary screen was carried out with compounds at 20 μM in singleton. The throughput was set to about 6000 compounds per working day encompassing 25 plates. The screening was performed with Raw264.7 cells that had been expanded from frozen stocks for ten days before infection with M. tuberculosis H37Rv-GFP. To accept the screening results, the MICs obtained from 2 serial dilutions of INH and Rifampin processed at the beginning and at the end of the screening day should show similar results compared to the values obtained during the validation (see above). Each screened plate is then accepted by the quality control procedure if the window between DMSO and INH (1 μg/ml) is higher than 3 and the CV calculated for the 320 compounds present in each plate is lower than 25. Such quality control criteria allow the identification of hits with an activity higher than 75%. Subsequently, the percent inhibition for each compound was determined relative to the corresponding mean infection ratio between 1 μg/mL INH (100%) and DMSO (0%) in the same 384-well plate. The percent inhibition distribution is centered around −20% of inhibition (FIG. 4 a). It was decided to select compounds that have an inhibitory effect greater than 65% which corresponds to a little less than 1.5% of the total compounds.

In parallel, the same compounds were only tested for their inhibitory activity on the M. tuberculosis H37Rv-GFP bacterial growth. The results from this assay, which are based on classical fluorescence intensity, showed a higher degree of reproducibility and the criteria for plate validation was set to a Z′ value (DMSO/INH) greater than 0.35. The throughput for this fluorescence based assay was approximately 20,000 compounds per day. Compounds that prevented M. tuberculosis growth in vitro with an inhibitory effect above 65% were then selected as hits (1.4%) as they belong to a clear independent population compared to the inactive population centered to 0% (FIG. 4 b).

The results gathered from the two different screenings were then compiled and compared (FIG. 4 c). Four different populations could be identified: compounds that are i) active only on extracellular bacteria, ii) active only on intracellular bacteria, iii) active in both settings or iv) not active. 657 compounds (2.5%) belonged to one of the first three categories and, thus, were selected for further investigation.

An important parameter that can be measured during image analysis is the total cell number, also referred to as cell cytotoxicity. A low cell number can be the result of two independent phenomena, the compound toxicity and M. tuberculosis growth mediated cell toxicity. Indeed, at day 5 after infection with M. tuberculosis, the cell number decreased to less than 100 cells per image compared to more than 500 cells per image for uninfected cells (FIG. 1 e). In contrast, a high cell number is obtained only when the compound is not toxic and prevents mycobacterial growth. This turns out to be a second relevant measurement of a compound's anti-mycobacterial activity. However, this criterion was not applied for the selection of hits from the primary screen as a low cell number was found for only a few compounds and the inventors wanted to avoid failing to select highly active compounds that would later on prove to be active at much lower concentrations despite a cell toxicity at 20 μM. An additional validation criterion of a Z′ (DMSO/INH) value of the total cell number greater than 0.2 was added for the following screening steps.

Example 5 Confirmation of Screening Results, Dose-Response Analysis and Hit Classification

The 657 selected hits were first confirmed at 3 different concentrations, 20 μM, 2 μM and 0.2 μM. For 340 hits the activity was confirmed either at 20 μM or 2 μM, on the intracellular or the in vitro assay (see Table 1). From this latter list, 121 compounds demonstrated an inhibitory activity above 65% at 2 μM without any apparent cell toxicity at 20 μM and consequently were selected for further confirmation by ten 3-fold serial dilutions (see FIGS. 9-1 to 9-41). All 121 compounds were confirmed by serial dilution with a MIC ranging between 250 nM and 20 μM. The results shown in FIG. 5 are representative of the three types of behavior observed: most of the compounds exhibited a clear dose response curve when activity was measured as infection ratio (FIG. 5 b/e/h). Compounds active on the bacilli level present a similar activity in the extracellular assay (FIG. 5 c/f) even if the MIC is different from one assay to the other. A few compounds don't present clear activity on the in vitro bacilli (FIG. 5 i) and may represent drugs acting through a cellular target or on a bacilli target involved only during the infection process. Furthermore, toxic compounds can be identified thanks to a dramatic decrease in the cell number when the compound concentration increases (FIG. 5 d) and activity of non-toxic compounds are validated by a dose response protective effect on the cell number (FIG. 5 a). Consequently cell number detection represents an independent secondary assay in the same well as the primary assay. The serial dilution results from all 121 compounds are presented in FIGS. 9-1 to 9-41.

The 121 confirmed hits can be clustered as 20 independent/general scaffolds (Table 2). The number of compounds for each scaffold varied, ranging from 1 to 69 molecules. The molecules from the 69-compound scaffold share a common structure which is similar to INH thereby validating the screening results. One scaffold contains molecules that were only active in the intracellular assay and its mechanism of action will be the focus of further investigation.

Example 6 Derivatization of the Benzamide Compounds

The benzamide compounds (scaffold II; see Table 2) underwent derivatization according to the methods outlined below (Schemes 1-7). Formation of the amide can be performed under general conditions using EDC or DCC coupling reagents with acids instead of acyl chloride. Resulting derivatives were examined for inhibitory activity using the assay described above and the results are summarized in Table 3.

General procedure for the synthesis of 2-phenoxyethyl isoindoline-1,3-dione (A1)

To a solution of 2-(2-hydroxyethyl)isoindoline-1,3-dione (1.68 mmol) in methylene chloride (10 mL) was added ADDP (1.68 mmol), triphenylphosphine (1.68 mmol) and phenol (3.18 mmol) and stirred at room temperature. After stirring overnight, the reaction mixture was diluted with methylene chloride (30 mL) and washed with 1 M NaOH aqueous solution (50 mL), and brine (50 mL). The organic layer was dried over anhydrous MgSO₄ and concentrated in vacuo. The crude product was purified by silica gel flash column chromatography (4:1 hexanes/ethyl acetate) and recrystallized from a mixture of hexanes and ethyl acetate to give A1.

General Procedure for the Synthesis of N-(2-Phenoxyethyl)-Benzamide (A2)

To a solution of A1 (1.14 mmol) in methanol (10 mL) was added hydrazine monohydrate (1.42 mmol) and the resulting mixture was refluxed under a nitrogen atmosphere. After 3 h, the reaction mixture was allowed to cool to room temperature and concentrated in vacuo. The residue was precipitated with methylene chloride (10 mL). The resulting precipitate was filtered through Celite and the filtrate was concentrated in vacuo to afford an amine intermediate. To a solution of the amine in methylene chloride (10 mL) was added triethylamine (0.45 mmol) and a benzoylchloride (0.45 mmol) at 0° C. and the resulting mixture was stirred at room temperature. After 3 h, the reaction mixture was diluted with methylene chloride (10 mL) and washed with 1 M HCl aqueous solution (30 mL), saturated Na₂CO₃ aqueous solution (30 mL) and brine (30 mL). The organic layer was dried over anhydrous MgSO₄ and concentrated in vacuo. The crude product was purified by silica gel flash column chromatography (3:1 hexanes/ethyl acetate) and recrystallized from a mixture of hexanes and ethyl acetate to give A2.

3,5-Dinitro-N-(2-phenoxyethyl)benzamide (1)

¹H NMR (400 MHz, Acetone-d₆) δ 3.88 (t, J=4.4 Hz, 2H), 4.21 (t, J=5.2 Hz, 2H), 6.89 (d, J=8.4 Hz, 3H), 7.24 (t, J=8.0 Hz, 2H), 8.78 (brs, 1H), 9.02 (d, J=2.0 Hz, 1H), 9.07 (d, J=2.0 Hz, 2H); ¹³C NMR (100 MHz, Acetone-d₆) δ 40.1, 66.0, 114.5, 120.8, 127.6, 129.6, 137.8, 148.8, 158.9, 163.0.

N-(2-(2-Methoxyphenoxy)ethyl)-3,5-dinitrobenzamide (2)

¹H NMR (400 MHz, CDCl₃) δ 3.89 (s, 3H), 3.92 (dd, J=5.2, 10.4 Hz, 2H), 4.23 (t, J=4.8 Hz, 2H), 6.91-7.02 (m, 4H), 7.63 (brs, 1H), 9.02 (d, J=1.6 Hz, 2H), 9.14 (t, J=2.0 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ40.0, 56.1, 68.8, 112.2, 115.8, 121.0, 121.5, 122.9, 127.3, 137.8, 147.5, 148.6, 149.8, 162.6.

N-(2-(3-Methoxyphenoxy)ethyl)-3,5-dinitrobenzamide (3)

¹H NMR (400 MHz, Acetone-d₆) δ 3.74 (s, 3H), 3.85 (dd, J=5.6 Hz, 4.8 Hz, 2H), 4.21 (t, J=5.2 Hz, 2H), 6.50 (m, 3H), 7.14 (t, J=8.4 Hz, 1H), 8.75 (brs, 1H), 9.04 (s, 1H), 9.08 (s, 2H); ¹³C NMR (100 MHz, Acetone-d₆) δ 40.1, 54.8, 66.1, 100.9, 106.5, 106.8, 120.9, 127.5, 130.0, 137.9, 148.8, 160.2, 161.2, 163.0.

N-(2-(4-Methoxyphenoxy)ethyl)-3,5-dinitrobenzamide (4)

¹H NMR (400 MHz, CDCl₃) δ 3.72 (s, 3H), 3.91 (dd, J=5.2, 10.8 Hz, 2H), 4.12 (t, J=4.8 Hz, 2H), 6.74-6.80 (m, 4H), 7.21 (brs, 1H), 8.95 (d, J=2.0 Hz, 2H), 9.07 (t, J=2.0 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 40.4, 55.6, 66.8, 114.7, 115.4, 121.0, 127.2, 137.6, 148.5, 152.2, 154.3, 163.1; LC-MS (ESI, m/z): 361 [M+H]⁺.

N-(2-(2-Chlorophenoxy)ethyl)-3,5-dinitrobenzamide (5)

¹H NMR (400 MHz, CDCl₃) δ 3.97 (dd, J=5.2, 10.4 Hz, 2H), 4.25 (t, J=5.2 Hz, 2H), 6.93-6.95 (m, 2H), 7.19-7.24 (m, 2H), 7.35 (dd, J=1.2, 8.0 Hz, 1H), 8.98 (d, J=2.0 Hz, 2H), 9.12 (t, J=2.0 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 34.9, 63.0, 109.7, 116.2, 117.7, 118.2, 122.3, 123.1, 125.5, 132.6, 143.7, 148.7, 157.9.

N-(2-(3-Chlorophenoxy)ethyl)-3,5-dinitrobenzamide (6)

¹H NMR (400 MHz, CDCl₃) δ 3.97 (dd, J=5.6, 10.8 Hz, 2H), 4.19 (t, J=4.8 Hz, 2H), 6.80-6.98 (m, 4H), 7.24 (t, J=8.0 Hz, 1H), 8.96 (d, J=2.0 Hz, 2H), 9.17 (t, J=2.0 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 40.1, 66.4, 110.7, 115.0, 121.2, 121.7, 127.2, 130.4, 135.1, 137.6, 148.7, 158.8, 163.0.

N-(2-(4-Chlorophenoxy)ethyl)-3,5-dinitrobenzamide (7)

¹H NMR (400 MHz, CDCl₃) δ 3.96 (dd, J=5.6, 10.4 Hz, 2H), 4.17 (t, J=4.8 Hz, 2H), 6.78 (brs, 1H), 6.86 (dd, J=2.4, 6.8 Hz, 2H), 7.23 (dd, J=2.0, 6.8 Hz, 2H), 8.96 (d, J=2.4 Hz, 2H), 9.17 (t, J=2.0 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ40.1, 66.5, 115.7, 121.2, 126.5, 127.2, 129.6, 137.6, 148.9, 156.8, 163.0.

N-(2-(2-Fluorophenoxy)ethyl)-3,5-dinitrobenzamide (8)

¹H NMR (400 MHz, CDCl₃) δ 3.97 (dd, J=5.2, 10.8 Hz, 2H), 4.25 (t, J=5.2 Hz, 2H), 6.91-7.06 (m, 4H), 7.39 (brs, 1H), 8.97 (d, J=2.0 Hz, 2H), 9.15 (t, J=2.0 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 40.1, 68.3, 115.7, 116.3 (d, J=20 Hz, due to F), 121.1, 122.3 (d, J=7Hz, due to F), 124.6 (d, J=5 Hz, due to F), 127.3, 137.6, 146.2, 148.6, 152.8 (d, J=250 Hz, due to F), 163.1; LC-MS (ESI, m/z): 350 [M+H]⁺.

N-(2-(4-Fluorophenoxy)ethyl)-3,5-dinitrobenzamide (9)

¹H NMR (400 MHz, Acetone-d₆) δ 3.88 (dd, J=5.2, 10.8 Hz, 2H), 4.23 (t, J=5.2 Hz, 2H), 6.95-7.07 (m, 4H), 8.79 (brs, 1H), 9.07 (t, J=2.4 Hz, 1H), 9.11 (d, J=2.0 Hz, 2H).

N-(2-(4-Hydroxyphenoxy)ethyl)-3,5-dinitrobenzamide (10)

¹H NMR (400 MHz, DMSO-d₆) δ 3.66 (dd, J=5.6, 11.2 Hz, 2H), 4.06 (t, J=5.2 Hz, 2H), 6.65-6.68 (m, 2H), 6.76-6.80 (m, 2H), 8.91 (brs, 1H), 8.98 (t, J=2.0 Hz, 1H), 9.08 (d, J=2.4 Hz, 2H), 9.42 (brs, 1H); ¹³C NMR (100 MHz DMSO-d₆) δ 40.1, 66.9, 116.2, 116.4, 121.5, 128.2, 137.4, 148.8, 151.8, 152.0, 163.1.

N-(2-(3-(Trifluoromethoxy)phenoxy)ethyl)-3,5-dinitrobenzamide (11)

¹H NMR (400 MHz, Acetone-d₆) δ 3.89 (dd, J=5.6, 11.2 Hz, 2H), 4.29 (t, J=5.6 Hz, 2H), 6.88 (d, J=6.0 Hz, 2H), 6.99 (d, J=8.0 Hz, 1H), 7.38 (t, J=8.4 Hz, 1H), 8.79 (brs, 1H), 9.05 (d, J=1.2 Hz, 1H), 9.08 (d, J=1.2 Hz, 2H); ¹³C NMR (100 MHz, Acetone-d₆) δ 39.9, 66.7, 107.8, 113.1, 113.6, 120.9, 127.6, 130.9, 137.8, 148.9, 150.1, 160.2, 163.0.

N-(2-(4-(Trifluoromethoxy)phenoxy)ethyl)-3,5-dinitrobenzamide (12)

¹H NMR (400 MHz, Acetone-d₆) δ 3.88 (dd, J=10.8 Hz, 5.2 Hz, 2H), 4.27 (t, J=5.6 Hz, 2H), 7.03 (dd, J=7.2, 2.0 Hz, 2H), 7.23 (d, J=8.8 Hz, 2H), 8.78 (brs, 1H), 9.04 (d, J=2.0 Hz, 1H), 9.08 (d, J=2.0 Hz, 2H); ¹³C NMR (100 MHz, Acetone-d₆) δ 40.0, 66.8, 115.7, 120.9, 122.7, 127.6, 137.8, 142.7, 142.8, 148.9, 157.9, 163.1.

Methyl 4-(2-(3,5-dinitrobenzamido)ethoxy)benzoate (13)

¹H NMR (400 MHz, Acetone-d₆) δ 3.81 (s, 3H), 3.91 (t, J=5.6 Hz, 2H), 4.33 (t, J=5.6 Hz, 2H), 7.00 (t, J=2.8 Hz, 1H), 7.03 (t, J=2.8 Hz, 1H), 7.90 (t, J=2.8 Hz, 1H), 7.92 (t, J=2.8 Hz, 1H), 8.78 (brs, 1H), 9.03 (t, J=2.4 Hz, 1H), 9.07 (d, J=2.4 Hz, 2H); ¹³C NMR (100 MHz, Acetone-d₆) δ39.9, 51.3, 66.5, 114.4, 120.9, 123.0, 127.6, 131.5, 137.8, 148.9, 162.8, 163.0, 166.1.

N-(2-(4-Aminophenoxy)ethyl)-3,5-dinitrobenzamidehydrochloride (14)

¹H NMR (400 MHz, DMSO-d₆) δ 3.67 (d, J=5.2 Hz, 2H), 4.15 (t, J=5.2 Hz, 2H), 7.03 (d, J=1.6 Hz, 2H), 7.29 (d, J=1.6 Hz, 2H), 8.91 (d, J=2.0 Hz, 1H), 9.04 (d, J=2.0 Hz, 2H), 9.52 (brs, 1H), 10.28 (brs, 3H); ¹³C NMR (100 MHz, DMSO-d₆) δ 40.1, 66.1, 115.4, 120.8, 124.3, 124.5, 127.5, 136.7, 148.1, 157.8, 162.4.

N-(2-(4-(t-Butoxycarbonylamino)phenoxy)ethyl)-3,5-dinitrobenzamide (15)

¹H NMR (400 MHz, Acetone-d₆) δ 1.44 (s, 9H), 3.83 (m, 2H), 4.18 (m, 2H), 6.84 (dd, J=3.2, 9.2 Hz, 2H), 7.40 (d, J=7.6 Hz, 2H), 8.15 (brs, 1H), 8.73 (brs, 1H), 9.03 (t, J=2.0 Hz, 1H), 9.08 (d, J=2.0 Hz, 2H); ¹³C NMR (100 MHz, Acetone-d₆) δ 27.8, 40.1, 66.4, 78.9, 114.8, 119.9, 120.9, 127.6, 133.3, 137.9, 148.8, 153.2, 154.4, 163.0; LC-MS (ESI, m/z): 469[M+Na]⁺.

N-(2-(4-Methoxyphenoxy)ethyl)-3-nitrobenzamide (16)

¹H NMR (400 MHz, CDCl₃) δ 3.69 (s, 3H), 3.81 (dd, J=5.2, 10.4 Hz, 2H), 4.06 (t, J=5.6 Hz, 2H), 6.73-6.78 (m, 4H), 7.48 (brs, 1H), 7.53 (t, J=8.0 Hz, 1H), 8.13 (d, J=7.6 Hz, 1H), 8.24 (d, J=10.4 Hz, 1H), 8.56 (t, J=2.0 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 39.8, 55.4, 66.7, 114.4, 115.2, 121.9, 125.8, 129.5, 133.1, 135.7, 147.8, 152.3, 153.9, 165.2.

N-(2-(2-Fluorophenoxy)ethyl)-3-nitrobenzamide (17)

¹H NMR (400 MHz, CDCl₃) δ 3.92 (dd, J=5.6, 10.8 Hz, 2H), 4.23 (t, J=4.8 Hz, 2H), 6.90-7.09 (m, 4H and brs, 1H), 7.62 (t, J=8.0 Hz, 1H), 8.14 (d, J=8.0 Hz, 1H), 8.33 (d, J=8.0 Hz, 1H), 8.63 (t, J=2.0 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 39.8, 68.3, 115.6, 116.6 (d, J=18.6 Hz, due to F), 122.3 (d, J=5.3 Hz, due to F), 124.7 (d, J=4.5 Hz, due to F), 126.0, 129.7, 133.0, 135.8, 146.3 (d, J=10.4 Hz, due to F), 148.1, 152.6 (d, J=245 Hz, due to F), 165.2.

N-(2-(4-Methoxyphenoxy)ethyl)benzamide (18)

¹H NMR (400 MHz, CDCl₃) δ 3.72 (s, 3H), 3.80 (dd, J=5.2, 10.8 Hz, 2H), 4.05 (t, J=5.6 Hz, 2H), 6.78-6.83 (m, 4H), 7.03 (brs, 1H), 7.35-7.45 (m, 4H), 7.74 (d, J=11.2 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ9.4, 55.4, 67.1, 114.5, 115.2, 126.8, 128.3, 131.3, 134.1, 152.4, 153.9, 167.6.

N-(2-(4-Methoxyphenoxy)ethyl)-N-methyl-3,5-dinitrobenzamide (19)

(Two rotamers, 1:1) ¹H NMR (400 MHz, CDCl₃) δ 3.18 (brs, 3H), 3.65 (brs, 1H), 3.75 (s, 3H), 3.94 (brs, 1H), 4.03 (brs, 1H), 4.27 (brs, 1H), 6.79-6.84 (brd, 4H), 8.55 (brs, 1H), 8.72 (brs, 1H), 9.04 (brs, 1H).

N-Ethyl-N-(2-(4-methoxyphenoxy)ethyl)-3,5-dinitrobenzamide (20)

(Two rotamers, 1:1) ¹H NMR (400 MHz, CDCl₃) δ 1.22-1.30 (m, 3H), 3.42 (brs, 1H), 3.63 (brs, 2H), 3.75 (s, 3H), 3.89 (brs, 1H), 4.01 (brs, 1H), 4.26 (brs, 1H), 6.80 (br, 4H), 8.53 (brs, 1H), 8.72 (brs, 1H), 9.04 (brs, 1H).

N-(3-(4-Methoxyphenoxy)propyl)-3,5-dinitrobenzamide (21)

¹H NMR (400 MHz, CDCl₃) δ 2.04-2.20 (m, 2H), 3.76 (t, J=6.0 Hz, 2H), 3.77 (s, 3H), 4.17 (t, J=5.2 Hz, 2H), 6.85-6.91 (m, 4H), 7.24 (brs, 1H), 8.96 (d, J=2.0 Hz, 2H), 9.16 (t, J=102.0 Hz, 1H).

Methyl 4-(3-(3,5-dinitrobenzamido)propoxy)benzoate (22)

¹H NMR (400 MHz, CDCl₃) δ 2.21-2.24 (m, 2H), 3.77 (dd, J=6.0, 12.0 Hz, 2H), 3.89 (s, 3H), 4.24 (t, J=5.6 Hz, 2H), 6.95 (d, J=8.8 Hz, 2H), 7.04 (brs, 1H), 8.00 (d, J=8.8 Hz, 2H), 8.96 (d, J=2.0 Hz, 2H), 9.16 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 28.4, 39.3, 52.0, 67.2, 113.9, 121.1, 123.3, 127.0, 131.8, 137.8, 148.6, 161.9, 162.5, 166.6.

N-(3-(2-Fluorophenoxy)propyl)-3,5-dinitrobenzamide (23)

¹H NMR (400 MHz, CDCl₃) δ 2.19-2.25 (m, 2H), 3.83 (dd, J=5.2, 11.2 Hz, 2H), 4.27 (t, J=5.2 Hz, 2H), 6.90-7.11 (m, 4H), 7.50 (brs, 1H), 8.99 (d, J=2.0 Hz, 2H), 9.16 (t, J=2.0 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 28.2, 40.0, 69.5, 114.0, 116.3 (d, J=18 Hz, due to F), 120.9, 121.8 (d, J=7.4 Hz, due to F), 124.7 (d, J=3.7 Hz, due to F), 127.2, 127.3, 138.1, 147.3 (d, J=245 Hz, due to F), 153.5, 162.7.

General Procedure for the Synthesis of N-(2-(benzyloxy)ethyl)-dinitrobenzamide (B2)

To a solution of 2-(2-hydroxyethyl)isoindoline-1,3-dione (1.17 mmol) in dimethyl formamide (10 mL) was added sodium hydride (2.34 mmol) and a benzyl bromide (1.40 mmol) at 0° C. and the resulting mixture was stirred at room temperature. After stirring overnight, distilled water (50 mL) was added and the resulting precipitate was collected by filtration to afford B1.

To a solution of B1 (0.85 mmol) in methanol (10 mL) was added hydrazine monohydrate (0.85 mmol) and the resulting mixture was refluxed under a nitrogen atmosphere. After 3 h, the reaction mixture was allowed to cool to room temperature and concentrated in vacuo. The residue was precipitated with methylene chloride (10 mL). The resulting precipitate was filtered off through Celite, and the filtrate was concentrated in vacuo to afford an amine.

To a solution of the amine in methylene chloride (10 mL) was added triethylamine (113 μl, 0.81 mmol) and a benzoylchloride (0.81 mmol) at 0° C. and the resulting mixture was stirred at room temperature. After 3 h, the reaction mixture was diluted with methylene chloride (30 mL) and washed with 1 M HCl aqueous solution (50 mL), saturated Na₂CO₃ aqueous solution (50 mL) and brine (50 mL). The organic layer was dried over anhydrous MgSO₄ and concentrated in vacuo. The crude product was purified by silica gel flash column chromatography (3:1 hexanes/ethyl acetate) and recrystallized from a mixture of hexanes and ethyl acetate to give B2.

N-(2-(Benzyloxy)ethyl)-3,5-dinitrobenzamide (24)

¹H NMR (400 MHz, CDCl₃) δ 3.68-3.72 (m, 4H), 4.55 (s, 2H), 6.75 (brs, 1H), 7.24-7.33 (m, 5H), 8.91 (d, J=2.0 Hz, 2H), 9.13 (t, J=2.0 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 40.4, 68.1, 73.4, 121.0, 127.2, 128.0, 128.2, 128.7, 137.5, 138.0, 148.6, 162.7; LC-MS (ESI, m/z): 346[M+H]⁺.

N-(2-(3-Methoxybenzyloxy)ethyl)-3,5-dinitrobenzamide (25)

¹H NMR (400 MHz, CDCl₃) δ 3.71-3.74 (m, 4H), 3.76 (s, 3H), 4.52 (s, 2H), 6.77-6.90 (m, 3H), 6.97 (brs, 1H), 7.23 (t, J=8.0 Hz, 1H), 8.91 (d, J=2.0 Hz, 2H), 9.12 (t, J=2.0 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 40.5, 55.2, 68.2, 73.1, 113.1, 113.6, 120.0, 120.9, 127.2, 129.6, 137.8, 139.1, 148.5, 159.7, 162.8.

N-(2-(4-Methoxybenzyloxy)ethyl)-3,5-dinitrobenzamide (26)

¹H NMR (400 MHz, CDCl₃) δ 3.65-3.71 (m, 4H), 3.75 (s, 3H), 4.47 (s, 2H), 6.71 (brs, 1H), 6.84 (dd, J=6.8, 2.0 Hz, 2H), 7.23 (d, J=8.4 Hz, 2H), 8.87 (d, J=2.4 Hz, 2H), 9.13 (t, J=2.0 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 40.5, 55.3, 67.8, 73.1, 114.0, 121.0, 127.1, 129.6, 130.0, 137.9, 148.6, 159.5, 162.7.

N-(2-(4-Chlorobenzyloxy)ethyl)-3,5-dinitrobenzamide (27)

¹H NMR (400 MHz, CDCl₃) δ 3.68-3.76 (m, 4H), 4.53 (s, 2H), 6.77 (brs, 1H), 7.25-7.32 (m, 4H), 8.91 (d, J=2.0 Hz, 2H), 9.15 (t, J=2.0 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 40.4, 68.3, 72.6, 121.1, 127.2, 128.8, 129.2, 134.0, 136.0, 137.8, 148.6, 162.7.

N-(2-(3-chlorobenzyloxy)ethyl)-3,5-dinitrobenzamide (28)

¹H NMR (400 MHz, CDCl₃) δ 3.68-3.76 (m, 4H), 4.52 (s, 2H), 6.79 (brs, 1H), 7.17-7.29 (m, 4H), 8.91 (d, J=2.0 Hz, 2H), 9.13 (t, J=2.0 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 40.4, 68.4, 72.5, 121.1, 125.8, 127.2, 127.8, 128.1, 129.2, 134.5, 137.8, 139.6, 148.6, 162.8.

N-(2-(4-Fluorobenzyloxy)ethyl)-3,5-dinitrobenzamide (29)

¹H NMR (400 MHz, CDCl₃) δ 3.68-3.76 (m, 4H), 4.53 (s, 2H), 6.74 (brs, 1H), 7.02-7.06 (m, 2H), 7.30-7.33 (m, 2H), 8.92 (d, J=2.0 Hz, 2H), 9.16 (t, J=2.0 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 40.4, 68.1, 72.6, 115.5 (d, J=22 Hz, due to F), 121.1, 127.1, 130.0 (d, J=8.2 Hz, due to F), 133.5 (d, J=3.0 Hz, due to F), 137.8, 148.6, 162.5 (d, J=245 Hz, due to F), 162.7.

N-(2-(2-Fluorobenzyloxy)ethyl)-3,5-dinitrobenzamide (30)

¹H NMR (400 MHz, CDCl₃) δ 3.75 (s, 4H), 4.64 (s, 2H), 7.07-7.17 (m, 3H), 7.29-7.39 (m, 1H and brs. 1H), 8.94 (d, J=2.0 Hz, 2H), 9.17 (t, J=2.0 Hz, 1H).

3,5-Dinitro-N-(2-(4-(trifluoromethoxy)benzyloxy)ethyl)benzamide (31)

¹H NMR (400 MHz, CDCl₃) δ 3.72-3.76 (m, 4H), 4.54 (s, 2H), 7.13 (d, J=8.0 Hz, 2H), 7.31-7.35 (m, 2H and brs, 1H), 8.94 (d, J=2.0 Hz, 2H), 9.08 (t, J=2.0 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ0.4, 68.4, 72.2, 120.9, 121.0, 127.2, 129.1, 136.3, 137.7, 148.4, 148.7, 148.9, 162.9.

3,5-Dinitro-N-(2-(3-(trifluoromethyl)benzyloxy)ethyl)benzamide (32)

¹H NMR (400 MHz, CDCl₃) δ 3.72-3.79 (m, 4H), 4.61 (s, 2H), 7.06 (brs, 1H), 7.45-7.55 (m, 4H), 8.93 (d, J=2.0 Hz, 2H), 9.10 (t, J=2.0 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 40.4, 68.7, 72.4, 121.0, 124.1, 124.6, 124.7, 127.2, 129.0, 130.6 (q, J=32 Hz, due to F), 130.8, 137.7, 138.6, 148.6, 162.9.

Methyl 4-((2-(3,5-dinitrobenzamido)ethoxy)methyl)benzoate (33)

¹H NMR (400 MHz, CDCl₃) δ 3.71-3.74 (m, 4H), 3.84 (s, 3H), 4.55 (s, 2H), 7.29 (d, J=8.0 Hz, 2H and brs, 1H), 7.85 (d, J=8.0 Hz, 2H), 8.90 (d, J=2.0 Hz, 2H), 9.01 (t, J=2.0 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 40.6, 52.2, 68.8, 72.6, 120.9, 127.3, 129.5, 129.7, 137.8, 142.9, 148.5, 163.0, 166.8.

4-((2-(3,5-Dinitrobenzamido)ethoxy)methyl)benzoic acid (34)

¹H NMR (400 MHz, Acetone-d₆) δ 3.74 (t, J=5.2 Hz, 2H), 3.81 (t, J=5.2 Hz, 2H), 4.72 (s, 2H), 7.56 (d, J=8.4 Hz, 2H) 7.72 (brs, 1H), 8.03 (d, J=8.4 Hz, 2H), 9.02 (d, J=2.0 Hz, 2H), 9.13 (t, J=2.0 Hz, 1H).

N-(2-(Benzyloxy)ethyl)benzamide (35)

¹H NMR (400 MHz, CDCl₃) δ 3.62-3.68 (m, 4H), 4.52 (s, 2H), 6.71 (brs, 1H), 7.24-7.49 (m, 8H), 7.73-7.76 (m, 2H); ¹³C NMR (100 MHz, CDCl₃) δ 39.7, 68.8, 73.1, 126.9, 127.8, 128.4, 131.3, 134.5, 137.8, 167.5.

N-(2-(3-(Trifluoromethyl)benzyloxy)ethyl)benzamide (36)

¹H NMR (400 MHz, CDCl₃) δ 3.63-3.70 (m, 4H), 4.56 (s, 2H), 6.72 (brs, 1H), 7.37-7.53 (m, 6H), 7.58 (s, 1H), 7.74-7.76 (m, 2H); ¹³C NMR (100 MHz, CDCl₃) δ 39.7, 69.3, 72.3, 124.2, 124.3, 124.6, 126.9, 128.5, 128.9, 130.8, 131.5, 134.4, 139.0, 148.6, 167.6.

N-(2-(3-Chlorobenzyloxy)ethyl)benzamide (37)

¹H NMR (400 MHz, CDCl₃) δ 3.62-3.69 (m, 4H), 4.49 (s, 2H), 6.71 (brs, 1H), 7.17-7.50 (m, 7H), 7.75-7.77 (m, 2H); ¹³C NMR (100 MHz, CDCl₃) δ 39.7, 69.0, 72.2, 125.6, 126.8, 127.6, 127.8, 128.4, 129.7, 131.3, 134.3, 139.9, 167.4.

N-(2-(3-Chlorobenzyloxy)ethyl)-3,5-difluorobenzamide (38)

¹H NMR (400 MHz, CDCl₃) δ 3.64-3.69 (m, 4H), 4.52 (s, 2H), 6.54 (brs, 1H), 6.95 (tt, J=2.4, 11.2 Hz, 1H), 7.19-7.33 (m, 6H).

N-(2-(3-Chlorobenzyloxy)ethyl)-3,5-dichlorobenzamide (39)

¹H NMR (400 MHz, CD₃OD) δ 3.13 (t, J=5.2 Hz, 2H), 3.67 (t, J=5.2 Hz, 2H), 4.55 (s, 2H), 7.27-7.29 (m, 3H), 7.42 (s, 1H), 7.46, (s, 1H), 7.81 (s, 2H); ¹³C NMR (100 MHz, CDCl₃) δ40.6, 67.2, 73.2, 127.0, 128.7, 128.8, 128.9, 130.7, 131.0, 135.4, 135.5, 141.4, 142.7, 171.5.

N-(2-(3-Chlorobenzyloxy)ethyl)-3,5-bis(trifluoromethyl)benzamide (40)

¹H NMR (400 MHz, CDCl₃) δ 3.64-3.68 (m, 4H), 4.49 (s, 2H), 6.89 (brs, 1H), 7.15 (d, J=3.6 Hz, 1H), 7.21-7.24 (m, 2H), 7.27 (s, 1H), 7.95 (s, 1H), 8.18 (s, 2H); ¹³C NMR (100 MHz, CDCl₃) δ40.3, 68.37, 72.5, 121.6, 125.0, 125.1, 125.7, 127.8, 128.1, 129.9, 132.0, 134.5, 136.6, 139.8, 164.8.

N-(2-(3-Chlorobenzyloxy)ethyl)-3-methoxybenzamide (41)

¹H NMR (400 MHz, CDCl₃) δ 3.63 (d, J=3.6 Hz, 2H), 3.65 (d, J=3.6 Hz, 2H), 3.81 (s, 3H), 4.49 (s, 2H), 6.51 (brs, 1H), 7.01 (dd, J=8.0 Hz, 2.4 Hz, 1H), 7.16 (d, J=4.4 Hz, 1H), 7.28 (m, 3H), 7.25-7.34 (m, 3H); ¹³C NMR (100 MHz, CDCl₃) δ 39.9, 55.5, 69.2, 72.5, 112.4, 117.8, 118.7, 125.8, 127.8, 128.0, 129.6, 129.9, 134.5, 136.0, 140.0, 159.9, 167.5.

N-(2-(3-Chlorobenzyloxy)ethyl)-4-methoxybenzamide (42)

¹H NMR (400 MHz, CDCl₃) δ 3.62-3.66 (m, 4H), 3.82 (s, 3H), 4.49 (S, 2H), 6.48 (brs, 1H), 6.89 (d, J=8.8 hz, 2H), 7.17 (t, J=4.4 Hz, 2H), 7.24 (m, 1H), 7.32 (s, 1H), 7.71 (d, J=8.8 Hz, 2H) ¹³C NMR (100 MHz, CDCl₃) δ 39.8, 55.5, 69.4, 72.4, 113.8, 125.7, 126.8, 127.8, 128.0, 128.8, 129.8, 134.5, 140.1, 162.2, 167.1.

N-(2-(3-Chlorobenzyloxy)ethyl)-3-(trifluoromethoxy)benzamide (43)

¹H NMR (400 MHz, CDCl₃) δ 3.62-3.68 (m, 4H), 4.49 (s, 2H), 6.62 (brs, 1H), 7.15 (dd, J=1.2, 8.8 Hz, 1H), 7.22-7.23 (m, 2H), 7.36 (t, J=1.2 Hz, 2H), 7.43 (t, J=8.4 Hz, 1H), 7.63 (dd, J=1.2, 4.4 Hz, 2H); ¹³C NMR (100 MHz, CDCl₃) δ 40.0, 69.0, 72.4, 119.3, 120.1, 123.8, 125.1, 125.7, 127.8, 128.0, 129.9, 130.1, 134.5, 136.6, 140.0, 149.4, 166.1.

N-(2-(3-Chlorobenzyloxy)ethyl)-4-(trifluoromethyl)benzamide (44)

¹H NMR (400 MHz, CDCl₃) δ 3.62-3.68 (m, 4H), 4.49 (s, 2H), 6.71 (brs, 1H), 7.14-7.17 (m, 1H), 7.23-7.24 (m, 2H), 7.3 (s, 1H), 7.64 (d, J=8.0 Hz, 2H), 7.83 (d, 0.1=8.0 Hz, 2H); ¹³C NMR (100 MHz, CDCl₃) δ 40.0, 68.9, 72.4, 125.6 (q, J=3.7 Hz), 125.8, 127.5, 127.8, 128.1, 129.9, 138.1, 133.4, 134.5, 137.7, 140.0, 166.4.

N-(2-(3-Chlorobenzyloxy)ethyl)-3-(trifluoromethyl)benzamide (45)

¹H NMR (400 MHz, CDCl₃) δ 3.62 (m, 4H), 4.46 (s, 2H), 6.96 (brs, 1H), 7.14-7.27 (m, 4H), 7.47 (t, J=7.2 Hz, 1H), 7.68 (d, J=3.2 Hz, 1H), 7.89 (d, J=3.2 Hz, 1H), 8.01 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 40.0, 68.9, 72.3, 122.4, 124.1, 125.7, 127.7, 127.9, 128.0, 129.1, 129.8, 130.3, 130.8, 134.4, 135.2, 140.0, 166.3.

Methyl 3-(2-(3-chlorobenzyloxy)ethylcarbamoyl)benzoate (46)

¹H NMR (400 MHz, CDCl₃) δ 3.62-3.69 (m, 4H), 3.89 (s, 3H), 4.48 (s, 2H), 6.71 (brs, 1H), 7.15-7.16 (m, 1H), 7.21-7.24 (m, 2H), 7.28 (s, 1H), 7.47 (t, J=4.0 Hz, 1H), 7.97 (d, J=4.8 Hz, 1H), 8.11 (d, J=4.8 Hz, 1H), 8.35 (t, J=1.6 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 40.0, 52.4, 69.0, 72.4, 125.7, 127.7, 127.8, 128.0, 128.9, 129.8, 130.5, 131.8, 132.4, 134.4, 134.8, 140.0, 166.3, 166.6.

Methyl 4-(2-(3-chlorobenzyloxy)ethylcarbamoyl)benzoate (47)

¹H NMR (400 MHz, CDCl₃) δ 3.62-3.66 (m, 4H), 3.90 (s, 3H), 4.48 (s, 2H), 6.65 (brs, 1H), 7.14-7.17 (m, 1H), 7.22 (d, J=5.2 Hz, 2H), 7.30 (s, 1H), 7.78 (d, J=8.0 Hz, 2H), 8.04 (d, J=8.0 Hz, 2H); ¹³C NMR (100 MHz, CDCl₃) δ 40.0, 52.4, 69.0, 72.4, 125.7, 127.1, 127.8, 128.1, 129.9, 132.7, 134.5, 138.4, 140.0, 160.3, 166.7.

N-(2-(3-Chlorobenzyloxy)ethyl)-3-nitrobenzamide (48)

¹H NMR (400 MHz, CDCl₃) δ 3.64 (m, 4H), 4.45 (s, 2H), 7.13-7.23 (m, 5H), 7.53 (m, 1H), 8.08 (d, J=6.8 Hz, 1H) 8.22 (d, J=6.8 Hz, 1H), 8.54 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 40.1, 68.7, 72.2, 122.0, 125.6, 125.9, 127.5, 127.8, 129.7, 129.8, 133.1, 134.2, 136.0, 139.9, 148.0, 165.3.

N-(2-(3-Chlorobenzyloxy)ethyl)-4-nitrobenzamide (49)

¹H NMR (400 MHz, CDCl₃) δ 3.63 (m, 4H), 4.45 (s, 2H), 6.97 (brs, 1H), 7.12-7.25 (m, 4H), 7.87 (d, J=6.4 Hz, 2H), 8.15 (d, J=6.4 Hz, 2H); ¹³C NMR (100 MHz, CDCl₃) δ 40.1, 68.7, 72.2, 123.6, 125.6, 127.5, 127.9, 128.2, 129.7, 134.3, 139.9, 140.0, 149.4, 165.6.

N-(2-(3-Chlorobenzyloxy)ethyl)-3-fluorobenzamide (50)

¹H NMR (400 MHz, CDCl₃) δ 3.56-3.61 (m, 4H), 4.43 (s, 2H), 6.66 (brs, 1H), 7.10-7.12 (m, 2H), 7.18-7.19 (m, 2H), 7.25 (s, 1H), 7.30-7.31 (m, 1H), 7.41-7.45 (m, 2H); ¹³C NMR (100 MHz, CDCl₃) δ 39.9, 69.0, 72.4, 114.3 (d, J=23.0 Hz, due to F), 118.4 (d, J=20.8 Hz, due to F), 122.4 (d, J=3.0 Hz, due to F), 125.7, 127.7, 128.0, 129.8, 130.2 (d, J=8.2 Hz, due to F), 134.5, 136.7 (d, J=6.7 Hz, due to F), 140.0, 163.0 (d, J=245 Hz, due to F), 166.3 (d, J=3.0 Hz, due to F).

N-(2-(3-Chlorobenzyloxy)ethyl)-3-chlorobenzamide (51)

¹H NMR (400 MHz, CDCl₃) δ 3.64 (m, 4H), 4.49 (s, 2H), 6.52 (brs, 1H), 7.17 (d, J=3.2 Hz, 1H), 7.24 (s, 2H), 7.31-7.36 (m, 2H), 7.44 (d, J=3.6 Hz, 1H), 7.59 (d, J=7.6 Hz, 1H), 7.73 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ40.0, 69.1, 72.5, 125.1, 125.8, 127.5, 127.8, 128.1, 129.9, 130.0, 131.6, 134.6, 134.9, 136.3, 140.0, 166.3.

N-(2-(3-Chlorobenzyloxy)ethyl)-4-hydroxybenzamide (52)

¹H NMR (400 MHz, CDCl₃) δ 3.64 (s, 4H), 4.48 (s, 2H), 6.57 (brs, 1H), 6.84 (dd, J=2.0, 8.8 Hz, 2H), 7.17 (d, J=3.2 Hz, 1H), 7.23 (d, J=3.2 Hz, 2H), 7.31 (s, 1H), 7.60 (dd, J=2.0, 8.8 Hz, 2H), 8.22 (brs, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 40.0, 69.1, 72.5, 115.7, 125.4, □125.8, 127.8, 128.1, 129.0, 129.9, 134.5, 140.0, 160.2, 168.2.

N-(2-(3-Chlorobenzyloxy)ethyl)-3-hydroxybenzamide (53)

¹H NMR (400 MHz, CDCl₃) δ 3.65 (m, 4H), 4.49 (s, 2H), 6.64 (brs, 1H), 6.98 (d, J=8.0 Hz, 1H), 7.13 (d, J=8.0 Hz, 1H), 7.17-7.26 (m, 5H), 7.30 (s, 1H), 7.50 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 40.0, 69.1, 72.5, 115.1, 117.8, 119.3, 125.9, 127.3, 128.1, 129.9, 130.0, 134.6, 135.4, 139.9, 157.2, 168.0.

General Procedure for the Synthesis of phenoxy-pyrrolidin-1-yl-methanone (C2)

To a solution of (S)-3-pyrrolidinol (10 mmol) and triethylamine (11 mmol) in methylene chloride (50 mL) was added benzoyl chloride (8.67 mmol) at 0° C. The reaction temperature was brought up to room temperature. After 2 h, the reaction mixture was diluted with methylene chloride (50 mL) and then washed with 0.5 M HCl aqueous solution (100 mL) and brine (100 mL). The organic layer was dried over anhydrous MgSO₄ and concentrated in vacuo. The crude product was purified by silica gel flash column chromatography (2:1 hexanes/ethyl acetate) to give C1.

To a solution of C1 (1.07 mmol) in methylene chloride (10 mL) was added ADDP (1.28 mmol), triphenylphosphine (1.28 mmol) and a phenol (1.28 mmol) at room temperature. After stirring overnight, the reaction mixture was diluted with methylene chloride (30 mL) and washed with 1 M HCl aqueous solution (50 mL), saturated Na₂CO₃ aqueous solution (50 mL) and brine (50 mL). The organic layer was dried over anhydrous MgSO₄ and concentrated in vacuo. The crude was purified by silica gel flash column chromatography (2:1 hexanes/ethyl acetate) and recrystallized from a mixture of hexanes and ethyl acetate to give C2.

(R)-(3,5-Dinitrophenyl)(3-(4-methoxyphenoxy)pyrrolidin-1-yl)methanone (54)

(Two rotamers, 1:1 ratio), m.p. 124-125° C.; ¹H NMR (400 MHz, CDCl₃) δ 2.11-2.19 (m, 1H), 2.30-2.34 (m, 1H), 3.54-3.64 (m, 1H), 3.72 & 3.76 (s, 3H), 3.81-3.99 (m, 3H), 4.86-4.94 (m, 1H), 6.74-6.84 (m, 4H), 8.68 & 8.75 (d, J=1.6 Hz, 2H), 9.05 & 9.08 (brs, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 30.6, 32.4, 45.2, 47.7, 52.8, 54.8, 55.8, 55.9, 75.7, 115.0, 117.1, 117.3, 120.1, 120.2, 127.7, 127.9, 139.9, 140.0, 148.6, 150.4, 150.8, 154.8, 154.8, 164.7, 165.1; LC-MS (ESI, m/z): 388 [M+H]⁺.

(R)-(3,5-Dinitrophenyl)(3-(4-fluorophenoxy)pyrrolidin-1-yl)methanone (55)

(Two rotamers, 1:1 ratio, 75%), a pale yellow solid; ¹H NMR (400 MHz, CDCl₃) δ 2.15-2.37 (m, 2H), 3.56-3.63 (m, 1H), 3.79-3.97 (m, 3H), 4.91-4.99 (m, 1H), 6.76-7.03 (m, 4H), 8.71 & 8.76 (d, J=1.6 Hz, 2H), 9.08 & 9.10 (brs, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 29.9, 32.3, 45.1, 47.7, 52.7, 54.8, 75.5, 77.0, 116.2, 116.5, 116.9, 117.0, 117.1, 120.1, 120.2, 127.7, 127.8, 139.8, 139.9, 148.6, 152.6, 152.9, 157.9 (d, J=245 Hz, due to F), 164.7, 165.0.

(R)—N-(4-(1-(3,5-Dinitrobenzoyl)pyrrolidin-3-yloxy)phenyl)acetamide (56)

(Two rotamers, 1:1 ratio, 63%), a yellow solid; ¹H NMR (400 MHz, CDCl₃+CD₃OD) δ 1.96 & 1.99 (s, 3H), 2.03-2.27 (m, 2H), 3.45-3.50 (m, 1H), 3.69-3.83 (m, 3H), 4.83-4.91 (m, 1H), 6.64 & 6.74 (d, J=8.8 Hz, 2H), 7.26 & 7.33 (d, J=8.8 Hz, 2H), 8.58 & 8.65 (d, J=2.0 Hz, 2H), 8.95-8.99 (m, 1H); ¹³C NMR (100 MHz, CDCl₃+CD₃OD) δ 23.3, 23.4, 29.7, 32.0, 45.0, 47.6, 52.6, 54.6, 75.0, 76.4, 115.8, 115.9, 120.0, 121.9, 127.4, 127.5, 127.6, 127.7, 132.4, 132.5, 139.4, 148.4, 152.8, 153.1, 165.0, 165.3, 169.7.

(R)-(3,5-Dinitrophenyl)(3-(4-(trifluoromethoxy)phenoxy)pyrrolidin-1-yl)methanone (57)

(Two rotamers, 6:4 ratio, 67%), a white solid; ¹H NMR (400 MHz, CDCl₃) δ 2.20-2.40 (m, 2H), 3.59-3.66 (m, 1H), 3.84-4.00 (m, 3H), 4.97-5.05 (m, 1H), 6.83 & 6.92 (d, J=8.8 Hz, 2H), 7.12 & 7.18 (d, J=8.8 Hz, 2H), 8.73 & 8.77 (d, J=2.0 Hz, 2H), 9.09 & 9.11 (d, J=2.0 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 29.8, 32.2, 45.1, 47.6, 52.6, 54.7, 75.2, 76.7, 116.4, 120.1, 122.8, 127.7, 127.8, 139.6, 139.7, 143.4, 148.5, 155.0, 155.2, 164.7, 164.9.

(R)-Methyl 4-(1-(3,5-dinitrobenzoyl)pyrrolidin-3-yloxy)benzoate (58)

(Two rotamers 1:1 ratio), ¹H NMR (400 MHz, CDCl₃) δ 2.21-2.37 (m, 2H), 3.57-3.65 (m, 1H), 3.85 & 3.87 (s, 3H), 3.89-3.99 (m, 3H), 5.03-5.11 (m, 1H), 6.82 & 6.91 (d, J=7.2 Hz, 2H), 7.93 & 7.99 (d, J=7.2 Hz, 2H), 8.70 & 8.75 (s, 2H), 9.07 & 9.09 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ22.1, 30.0, □ 32.4, 45.2, 47.7, 52.2, 52.8, 54.8, 74.9, 76.3, 115.0, 120.36, 123.7, 123.8, 127.8, 127.9, 132.0, 139.7, 148.6, 160.2, 160.5, 164.7, 166.7.

(R)-(3,5-Dinitrophenyl)(3-(2-fluorophenoxy)pyrrolidin-1-yl)methanone (59)

(Two rotamers 1:1 ratio), ¹H NMR (400 MHz, CD₃OD) δ 2.26-2.33 (m, 2H), 3.62-3.97 (m, 3H), 4.00 & 4.36 (s, 1H), 5.06 & 5.21 (s, 1H), 7.11 & 7.27 (m, 4H), 8.78 & 8.83 (d, J=2.0 Hz, 2H), 9.01 & 9.04 (d, J=2.0 Hz, 1H); ¹³C NMR (100 MHz, CD₃OD) δ □29.9, 31.9, 44.9, 52.3, 54.4, 77.2, 78.7, 116.62, 116.67, 116.80, 116.85, 117.8 (d, J=20 Hz, due to F), 120.04 (d, J=3.7 Hz, due to F), 122.5, 122.6, 122.70, 122.77, 125.1, 125.15 (d, J=3.7 Hz, due to F), 127.80 (d, 0.1=7.4 Hz due to F), 127.9, 139.8, 153.6 (d, J=244 Hz, due to F), 165.4, 165.5.

(S)-Methyl-4-(1-(3,5-dinitrobenzoyl)pyrrolidin-3-yloxy)benzoate (60)

(Two rotamers 1:1 ratio), ¹H NMR (400 MHz, Acetone-d₆) δ 2.21-2.29 (m, 2H), 3.58 & 3.61 (s, 1H), 3.69 & 3.71 (s, 3H), 3.73-4.02 (m, 3H), 4.99 & 5.06 (s, 1H), 6.77-6.94 (m, 4H), 8.73 & 8.77 (s, 2H), 8.96 & 8.99 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ □29.9, 31.9, 44.1, 44.7, 52.2, 54.2, 55.1, 55.2, 76.0, 77.5, 114.82, 114.88, 117.2, 119.6, 127.7, 127.8, 140.5, 148.7, 151.1, 151.3, 154.7, 164.6, 164.7.

(S)-(3,5-dinitrophenyl)(3-(4-methoxyphenoxy)pyrrolidin-1-yl)methanone (61)

(Two rotamers 1:1 ratio), ¹H NMR (400 MHz, Acetone-d₆) δ 2.19-2.28 (m, 2H) 3.60-4.01 (m, 4H), 4.98 & 5.06 (s, 1H), 6.76-6.94 (m, 4H), 8.73 & 8.76 (s, 2H), 8.95 & 8.99 (s, 1H); ¹³C NMR (100 MHz, Acetone-d₆) δ □31.9, 44.7, 52.2, 54.2, 55.0, 55.1, 65.8, 75.9, 77.5, 114.81, 114.87, 117.2, 119.6, 127.7, 127.8, 128.6, 129.8, 140.4, 148.7, 151.3, 154.7, 164.6, 164.7.

(S)—N-(4-(1-(3,5-Dinitrobenzoyl)pyrrolidin-3-yloxy)phenyl)acetamide (62)

(Two rotamers 1:1 ratio), ¹H NMR (400 MHz, Acetone-d₆) δ 1.99 (s, 3H), 2.22-2.28 (m, 2H), 3.54-4.06 (m, 3H), 5.04 & 5.11 (s, 1H), 6.80 & 6.90 (d, J=8.8 Hz, 1H), 7.46-7.70 (m, 4H, brs, 1H), 8.73 & 8.76 (s, 2H), 8.95 & 8.99 (s, 1H); ¹³C NMR (100 MHz, Acetone-d₆) δ□24.1, 24.2, 30.0, 32.2, 45.2, 47.7, 52.7, 54.7, 75.1, 76.6, 115.9, 120.0, 120.1, 127.7, 127.8, 128.7, 128.8, 131.6, 132.0, 132.4, 132.6, 132.7, 132.8, 139.7, 148.4, 153.1, 165.0, 169.1.

(S)-4-(1-(3,5-Dinitrobenzoyl)pyrrolidin-3-yloxy)benzoic acid (63)

(Two rotamers 1:1 ratio), ¹H NMR (400 MHz, Acetone-d₆) δ 2.31-2.42 (m, 2H), 3.61-3.65 (m, 1H), 3.75-4.06 (m, 3H), 5.19 & 5.28 (s, 1H), 7.02 & 7.13 (d, J=8.8 Hz, 2H), 7.98 & 8.06 (d, J=8.8 Hz, 2H), 8.72 & 8.78 (d, J=2.0 Hz, 2H), 9.02 & 9.05 (s, 1H).

(S)-(3,5-Dinitrophenyl)(3-(2-fluorophenoxy)pyrrolidin-1-yl)methanone (64)

(Two rotamers, 1:1 ratio), ¹H NMR (400 MHz, DMSO-d₆) δ 2.14-2.24 (m, 2H), 3.50-3.88 (m, 4H), 4.98 & 5.08 (s, 1H), 6.86-7.15 (m, 4H), 8.65 & 8.69 (s, 2H), 8.88 & 8.92 (s, 1H); ¹³C NMR (100 MHz, DMSO-d₆) δ □029.1, 31.1, 44.1, 51.5, 53.6, 76.4, 77.9, 115.7, 115.8, 115.9, 116.0, 117.1 (d, J=22.3 Hz, due to F), 119.2 (d, J=3.7 Hz, due to F), 121.7, 121.83, 121.88, 121.9, 124.2 (d, J=3.7 Hz, due to F), 127.0, 139.0, 144.1, 144.4, 148.0, 152.8 (d, J=242.6 Hz, due to F), 164.6, 164.7.

(R)-(3-(2-Fluorophenoxy)pyrrolidin-1-yl)(phenyl)methanone (65)

(Two rotamers 1:1 ratio), ¹H NMR (400 MHz, CDCl₃) δ 2.02-2.24 (m, 2H), 3.51-3.91 (m, 4H), 4.85 & 4.98 (s, 1H), 6.86-7.09 (m, 4H), 7.36-7.48 (m, 3H), 7.52 (d, J=5.2, 1H), 7.53 (d, J=5.2 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ □30.3, 32.4, 44.3, 47.5, 52.1, 54.8, 78.0, 79.0, 116.8, 117.0, 117.9, 118.6, 122.6, 122.7, 122.9, 123.0, 124.6 (d, J=3.7 Hz due to F), 127.2, 127.4, 128.5, (d, J=3.7 Hz, due to F), 130.1, 130.3, 136.7, 136.9, 144.7 (d, J=20.1 Hz due to F), 153.8 (d, J=245.6 Hz, due to F), 155.2, 170.0, 170.2.

(R)-(3-(4-Methoxyphenoxy)pyrrolidin-1-yl)(phenyl)methanone (66)

(Two rotamers, 1:1 ratio), ¹H NMR (400 MHz, CDCl₃) δ 1.99-2.21 (m, 2H), 3.48-3.66 (m, 2H), 3.68 & 3.73 (s, 3H), 3.79-3.89 (m, 2H), 4.74 & 4.96 (s, 1H), 6.71 (s, 2H), 6.76 (s, 2H), 7.34 & 7.36 (d, J=5.6 Hz, 3H), 7.46 & 7.52 (d, J=5.2 Hz, 2H); ¹³C NMR (100 MHz, CDCl₃) δ 30.2, 32.3, 44.4, 47.6, 52.1, 54.8, 55.8, 55.9, 76.0, 114.9, 115.0, □ 117.1, 117.3, 127.3, 127.4, 128.50, 128.54, 130.1, 130.2, 136.8, 137.0, 150.9, 151.1, 154.5, 154.6, 169.9, 170.2; LC-MS (ESI, m/z): 298.1 [M+H]⁺.

(R)-(3,5-Dinitrophenyl)(3-hydroxypyrrolidin-1-yl)methanone (67)

(Two rotamers, 1:1 ratio), ¹H NMR (400 MHz, CDCl₃) δ 1.98-2.11 (m, 2H), 3.23 (brs, 1H), 3.37-3.48 (m, 1H), 3.61-3.79 (m, 3H), 4.47 & 4.56 (s, 1H), 8.62 & 8.67 (s, 2H), 8.99-9.00 (m, 1H); ¹³C NMR (100 MHz, CDCl₃) δ □33.0, 34.9, 45.1, 47.6, 55.5, 57.5, 69.4, 70.9, 120.1, 120.2, 127.8, 139.8, 139.9, 148.5, 165.1, 165.3.

(R)-(3-(3-Methoxyphenoxy)pyrrolidin-1-yl)(3-methoxyphenyl)methanone (68)

(Two rotamers, 1:1 ratio, 85%), a pale yellow liquid; ¹H NMR (400 MHz, CDCl₃) δ 1.97-2.22 (m, 2H), 3.48-3.65 (m, 2H), 3.68 & 3.71 (s, 3H), 3.73 & 3.76 (s, 3H), 3.79-3.89 (m, 2H), 4.74-4.84 (m, 1H), 6.70-6.80 (m, 4H), 6.86-6.92 (m, 1H), 6.99 & 7.01 (s, 1H), 7.04 & 7.08 (s, 1H), 7.21-7.28 (m, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 30.2, 32.3, 44.5, 47.7, 52.2, 54.8, 55.6, 55.8, 76.0, 112.6, 112.8, 114.9, 115.0, 116.1, 116.6, 117.1, 117.2, 119.4, 119.6, 179.27, 129.32, 138.1, 150.9, 151.1, 154.5, 159.7, 169.8.

(R)-(3-(4-Methoxyphenoxy)pyrrolidin-1-yl)(3-methoxyphenyl)methanone (69)

(Two rotamers, 1:1 ratio, 83%), a pale yellow liquid; ¹H NMR (400 MHz, CDCl₃) δ 1.97-2.22 (m, 2H), 3.48-3.65 (m, 2H), 3.68 & 3.71 (s, 3H), 3.73 & 3.76 (s, 3H), 3.79-3.89 (m, 2H), 4.72-4.84 (m, 1H), 6.70-6.80 (m, 4H), 6.86-6.92 (m, 1H), 6.99-7.08 (m, 2H), 7.21-7.28 (m, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 29.2, 32.1, 44.4, 47.6, 52.1, 54.4, 55.33, 55.62, 75.8, 113.4, 114.7, 116.9, 128.63, 128.75, 129.16, 129.32, 131.9, 150.9, 154.3, 160.9, 169.48, 169.79.

(R)-Methyl 3-(3-(4-methoxyphenoxy)pyrrolidine-1-carbonyl)benzoate (70)

(Two rotamers, 1:1 ratio, 87%), a pale yellow liquid; ¹H NMR (400 MHz, CDCl₃) δ 1.99-2.24 (m, 2H), 3.45-3.65 (m, 2H), 3.67 & 3.71 (s, 3H), 3.75-3.82 (m, 2H), 3.86 & 3.87 (s, 3H), 4.74-4.86 (m, 1H), 6.72 & 6.80 (m, 4H), 7.40-7.67 (m, 1H), 7.66 & 7.71 (d, J=7.6 Hz, 1H), 8.04 (t, J=9.0 Hz, 1H), 8.13 & 8.19 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 29.9, 32.0, 44.3, 47.3, 52.2, 54.5, 55.5, 55.6, 75.7, 114.7, 114.8, 116.9, 117.0, 128.1, 128.2, 128.5, 128.6, 130.9, 134.0, 131.5, 131.6, 136.8, 136.9, 150.5, 150.7, 154.33, 154.38, 166.6, 168.6, 168.9.

(R)-Methyl 4-(3-(4-methoxyphenoxy)pyrrolidine-1-carbonyl)benzoate (71)

(Two rotamers, 1:1 ratio, 85%), a pale yellow liquid; ¹H NMR (400 MHz, CDCl₃) δ 1.98-2.11 (m, 1H), 2.15-2.25 (m, 1H), 3.42-3.67 (m, 2H), 3.68 & 3.71 (s, 3H), 3.77-3.81 (m, 1H), 3.83-3.88 (m, 1H), 3.86 & 3.88 (s, 3H), 4.73-4.86 (m, 1H), 6.69-6.75 (m, 2H), 6.80 (s, 2H), 7.51 (d, J=8.0 Hz, 1H), 7.57 (d, J=8.4 Hz, 1H), 8.00 (d, J=8.4 Hz, 1H), 8.03 (d, J=8.4 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 29.9, 32.0, 44.2, 47.2, 51.9, 52.2, 54.3, 55.5, 55.6, 75.6, 114.7, 114.8, 116.8, 117.0, 127.0, 127.1, 129.5, 129.6, 131.2, 131.3, 140.7, 140.8, 150.5, 150.7, 154.3, 154.4, 168.7, 168.9.

(R)-(3-(4-Methoxyphenoxy)pyrrolidin-1-yl)-3-(trifluoromethyl)phenyl)methanone (72)

(Two rotamers, 1:1 ratio, 82%), a pale yellow liquid; ¹H NMR (400 MHz, CDCl₃) δ 2.04-2.15 (m, 1H), 2.21-2.30 (m, 1H), 3.48-3.67 (m, 2H), 3.72 & 3.75 (s, 3H), 3.78-3.90 (m, 2H), 4.79-4.90 (m, 1H), 6.74-6.83 (m, 4H), 7.48-7.55 (m, 1H), 7.64-7.82 (m, 3H); ¹³C NMR (100 MHz, CDCl₃) δ 30.0, 32.1, 44.5, 47.5, 52.2, 54.6, 55.7, 55.8, 75.8, 114.8, 114.9, 117.0, 117.2, 124.2, 124.3, 129.0, 129.1, 130.4, 130.6, 137.3, 137.4, 150.6, 150.8, 154.5, 154.6, 168.3, 168.6.

(R)-(3-(4-Methoxyphenoxy)pyrrolidin-1-yl)(4-(trifluoromethyl)phenyl)methanone (73)

(Two rotamers, 1:1 ratio, 55%), a pale yellow solid; ¹H NMR (400 MHz, CDCl₃) δ 2.03-2.06 (m, 1H), 2.20-2.25 (m, 1H), 3.49-3.70 (m, 2H), 3.72 & 3.75 (s, 3H), 3.81-3.88 (m, 2H), 4.72 & 8.89 (m, 1H), 6.74-6.83 (m, 4H), 7.23-7.50 (m, 4H); ¹³C NMR (100 MHz, CDCl₃) δ 30.0, 32.2, 44.5, 47.5, 52.2, 54.6, 55.7, 55.8, 75.8, 76.8, 114.9, 117.0, 117.2, 119.8, 120.1, 122.5, 122.6, 125.6, 125.8, 130.0, 130.1, 138.5, 149.1, 150.6, 150.9, 154.5, 168.2.

(R)-(3-(4-Methoxyphenoxy)pyrrolidin-1-yl)-3-(trifluoromethoxy)phenyl)methanone (74)

(Two rotamers, 1:1 ratio, 67%), a yellow liquid; ¹H NMR (400 MHz, CDCl₃) δ 2.01-2.23 (m, 2H), 3.43-3.68 (m, 2H), 3.69 & 3.72 (s, 3H), 3.72-3.83 (m, 2H), 4.75-4.88 (m, 1H), 6.72-6.82 (m, 4H), 7.58-7.66 (m, 4H); ¹³C NMR (100 MHz, CDCl₃) δ 29.1, 30.1, 32.2, 38.9, 44.6, 47.6, 52.2, 54.7, 55.8, 75.9, 114.9, 115.0, 117.1, 117.3, 125.5, 125.6, 127.7, 128.8, 150.8, 151.0, 154.6, 154.7, 168.5, 168.6.

(R)-(3-(4-Methoxyphenoxy)pyrrolidin-1-yl)(3-nitrophenyl)methanone (75)

(Two rotamers, 1:1 ratio, 84%), a yellow liquid; ¹H NMR (400 MHz, CDCl₃) δ 2.00-2.24 (m, 2H), 3.48-3.56 (m, 1H), 3.68 & 3.72 (s, 3H), 3.73-3.88 (m, 3H), 4.79-4.89 (m, 1H), 6.71-6.83 (m, 4H), 7.52-7.59 (m, 1H), 7.81 & 7.87 (d, J=7.6H, 1H), 8.22 (t, J=9.8 Hz, 1H), 8.32 & 8.38 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 29.8, 32.0, 44.5, 47.4, 52.2, 54.5, 55.5, 55.6, 75.6, 77.0, 114.7, 114.8, 116.9, 117.0, 122.2, 122.3, 124.6, 124.7, 129.6, 133.1, 133.2, 138.0, 138.1, 147.8, 150.4, 150.6, 154.3, 154.4, 166.9, 167.2.

(R)-(3-(4-Methoxyphenoxy)pyrrolidin-1-yl)(4-nitrophenyl)methanone (76)

(Two rotamers, 1:1 ratio, 73%), a yellow solid; ¹H NMR (400 MHz, CDCl₃) δ 2.01-2.31 (m, 2H), 3.44-3.69 (m, 2H), 3.72 & 3.75 (s, 3H), 3.80-3.90 (m, 2H), 4.79-4.90 (m, 1H), 6.72-6.82 (m, 4H), 7.63 & 7.70 (d, J=8.0 Hz, 2H), 8.22 & 8.24 (d, J=8.2 Hz, 2H); ¹³C NMR (100 MHz, CDCl₃) δ 30.2, 31.9, 44.3, 47.2, 52.0, 55.5, 75.5, 76.7, 114.7, 114.8, 116.8, 116.9, 123.5, 128.0, 128.2, 128.6, 142.4, 142.5, 148.4, 150.3, 150.6, 154.3, 154.4, 167.3, 167.6.

(R)-(3-Fluorophenyl)(3-(4-methoxyphenoxy)pyrrolidin-1-yl)methanone (77)

(Two rotamers, 1:1 ratio, 78%), a pale yellow liquid; ¹H NMR (400 MHz, CDCl₃) δ 2.01-2.11 (m, 1H), 2.12-2.42 (m, 1H), 3.48-3.69 (m, 2H), 3.71 & 3.74 (s, 3H), 3.78-3.87 (m, 2H), 4.76-4.88 (m, 1H), 6.72-6.82 (m, 4H), 7.05-7.36 (m, 4H); ¹³C NMR (100 MHz, CDCl₃) δ29.9, 32.0, 44.3, 47.4, 52.0, 54.5, 55.6, 75.7, 114.4, 114.8, 116.9, 117.1, 122.8, 122.9, 130.1, 130.2, 138.6, 138.7, 150.6, 150.8, 154.4, 154.5, 162.4 (d, J=245 Hz, due to F), 168.3, 168.5.

(R)-(3-Chlorophenyl)(3-(4-methoxyphenoxy)pyrrolidin-1-yl)methanone (78)

(Two rotamers, 1:1 ratio, 87%), a pale yellow liquid; ¹H NMR (400 MHz, CDCl₃) δ 2.01-2.24 (m, 2H), 3.47-3.69 (m, 2H), 3.71 & 3.74 (s, 3H), 3.78-3.86 (m, 2H), 4.75-4.88 (m, 1H), 6.73-6.82 (m, 4H), 7.26-7.42 (m, 3H), 7.46 & 7.52 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 29.9, 32.0, 44.3, 47.4, 52.0, 54.5, 55.6, 55.7, 75.7, 76.7, 114.7, 114.8, 116.6, 117.1, 125.1, 125.3, 127.3, 127.4, 129.7, 129.8, 130.0, 130.1, 134.3, 138.2, 138.3, 150.5, 150.7, 154.4, 168.1, 168.4

(R)-(3-Hydroxyphenyl)(3-(4-methoxyphenoxy)pyrrolidin-1-yl)methanone (79)

(Two rotamers, 1:1 ratio, 53%), a white liquid; ¹H NMR (400 MHz, CDCl₃) δ 1.96-2.25 (m, 2H), 3.53-3.74 (m, 2H), 3.77 & 3.81 (s, 3H), 3.83-3.94 (m, 2H), 4.73 & 4.87 (m, 1H), 6.72-6.82 (m, 4H), 6.85-6.98 (m, 2H), 7.08-7.20 (m, 2H), 8.21 (brs, 1H);

(R)-(4-Hydroxyphenyl)(3-(4-methoxyphenoxy)pyrrolidin-1-yl)methanone (80)

(Two rotamers, 1:1 ratio, 37%), a white solid; ¹H NMR (400 MHz, CDCl₃) δ 2.03-2.32 (m, 2H), 3.59-3.71 (m, 2H), 3.74 & 3.76 (s, 3H), 3.79-3.93 (m, 2H), 4.80-4.91 (m, 1H), 6.75-6.84 (m, 4H), 7.21-7.24 (m, 2H), 7.56 & 7.62 (d, J=8.0 Hz, 2H), 8.01 & 8.03 (brs, 1H).

(R)-(4-Hydroxy-3-nitrophenyl)(3-(4-methoxyphenoxy)pyrrolidin-1-yl)methanone (81)

(Two rotamers, 1:1 ratio, 63%), a yellow liquid; ¹H NMR (400 MHz, CDCl₃) δ 2.01-2.14 (m, 1H), 2.25-2.27 (m, 1H), 3.56-3.65 (m, 2H), 3.72 & 3.74 (s, 3H), 3.81-3.91 (m, 2H), 4.81-4.89 (m, 1H), 6.76 (m, 4H), 7.16 (t, J=9.4 Hz, 1H), 7.78 & 7.84 (d, J=8.4 Hz, 1H), 8.29 & 8.37 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 29.9, 31.8, 45.0, 47.6, 52.6, 54.9, 55.9, 115.1, 117.2, 117.3, 120.4, 124.7, 125.0, 128.8, 133.1, 136.9, 137.0, 151.0, 154.7, 156.4, 166.9, 167.3.

(R)-(3,5-Dichlorophenyl)(3-(4-methoxyphenoxy)pyrrolidin-1-yl)methanone (82)

(Two rotamers, 1:1 ratio, 85%), a pale yellow liquid; ¹H NMR (400 MHz, CDCl₃) δ 2.02-2.10 (m, 1H), 2.20-2.25 (m, 1H), 3.47-3.70 (m, 2H), 3.72 & 3.74 (s, 3H), 3.75-3.85 (m, 2H), 4.78-4.87 (m, 1H), 6.74-6.82 (m, 4H), 7.34-7.41 (m, 3H); ¹³C NMR (100 MHz, CDCl₃) δ 29.9, 32.0, 44.4, 47.4, 52.1, 54.4, 55.6, 55.7, 75.5, 114.8, 116.9, 125.6, 125.7, 130.0, 135.1, 139.2, 139.3, 150.4, 150.7, 154.4, 154.5, 166.7, 167.0.

(R)-(3,5-Difluorophenyl)(3-(4-methoxyphenoxy)pyrrolidin-1-yl)methanone (83)

(Two rotamers, 1:1 ratio, 75%), a yellow liquid; ¹H NMR (400 MHz, CDCl₃) δ 2.01-2.27 (m, 2H), 3.48-3.67 (m, 2H), 3.71 & 3.74 (s, 3H), 3.77-3.85 (m, 2H), 4.78-4.88 (m, 1H), 6.73-6.87 (m, 5H), 6.99 & 7.06 (d, J=5.6 Hz, 2H); ¹³C NMR (100 MHz, CDCl₃) δ 29.8, 32.0, 44.4, 47.3, 52.1, 54.9, 55.6, 75.6, 105.3, 105.4, 110.3, 110.4, 110.5, 110.7, 114.8, 116.9, 117.1, 150.2, 154.9, 162.4 (d, J=250 Hz, due to F), 162.5 (d, J=250 Hz, due to F), 167.0,

(R)-(3,5-Bis(trifluoromethyl)phenyl)(3-(4-methoxyphenoxy)pyrrolidin-1-yl)methanone (84)

(Two rotamers, 1:1 ratio, 65%), a yellow liquid; ¹H NMR (400 MHz, CDCl₃) δ 2.08-2.14 (m, 1H), 2.24-2.29 (m, 1H), 3.47-3.67 (m, 2H), 3.71 & 3.74 (s, 3H), 3.76-3.91 (m, 2H), 4.81-4.91 (m, 1H), 6.74-6.83 (m, 4H), 7.90-8.12 (m, 3H); ¹³C NMR (100 MHz, CDCl₃) δ 29.8, 32.1, 44.6, 47.4, 52.3, 54.5, 55.6, 75.6, 114.8, 114.9, 116, 9, 117.2, 123.7, 124.3, 127.5, 127.7, 131.1, 132.1, 138.5, 138.6, 150.4, 150.7, 154.5, 154.7, 166.5, 166.8.

(R)-(3-(4-Methoxyphenoxy)pyrrolidin-1-yl)(pyridin-3-yl)methanone (85)

(Two rotamers, 1:1 ratio, 82%), a yellow solid; ¹H NMR (400 MHz, CDCl₃) δ 2.00-2.10 (m, 1H), 2.16-2.24 (m, 1H), 3.48-3.58 (m, 1H), 3.64-3.73 (m, 1H), 3.67 & 3.69 (s, 3H), 3.73-3.85 (m, 2H), 4.75-4.85 (m, 1H), 6.69-6.78 (m, 4H), 7.25-7.31 (m, 1H), 7.78 & 7.83 (d, J=7.6 Hz, 1H), 8.57-8.61 (m, 1H), 8.71 & 8.77 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 29.7, 31.9, 44.3, 47.2, 51.9, 54.4, 55.49, 55.53, 75.5, 114.66, 114.69, 116.8, 116.9, 123.1, 123.2, 132.3, 134.8, 134.9, 147.9, 148.1, 150.39, 150.63, 150.83, 150.89, 154.2, 154.3, 167.0, 167.3.

(R)-(3-(4-Methoxyphenoxy)pyrrolidin-1-yl)(pyridin-4-yl)methanone (86)

(Two rotamers, 1:1 ratio, 79%), a yellow solid; ¹H NMR (400 MHz, CDCl₃) δ 2.04-2.23 (m, 2H), 3.46-3.67 (m, 2H), 3.70 & 3.72 (s, 3H), 3.73-3.90 (m, 2H), 4.78-4.88 (m, 1H), 6.76-6.82 (m, 4H), 7.34 (s, 1H), 7.40 (s, 1H), 8.66 (d, J=13.2 Hz, 2H); ¹³C NMR (100 MHz, CDCl₃) δ 29.6, 31.7, 44.0, 46.8, 51.7, 53.9, 55.3, 55.4, 75.3, 114.5, 114.6, 116.7, 116.8, 120.9, 121.0, 143.6, 143.7, 149.7, 150.2, 154.1, 154.2, 166.9, 167.1.

(R)-4-(3-(4-Methoxyphenoxy)pyrrolidine-1-carbonyl)pyridine 1-oxide (87)

(Two rotamers, 1:1 ratio, 97%), a yellow solid; ¹H NMR (400 MHz, CDCl₃) δ 2.03-2.11 (m, 1H), 2.21-2.26 (m, 1H), 3.50-3.68 (m, 2H), 3.70 & 3.72 (s, 3H), 3.74-3.88 (m, 2H), 4.79-4.87 (m, 1H), 6.70-6.81 (m, 4H), 7.25-7.41 (m, 2H), 8.17-8.20 (m, 1H), 8.29 & 8.35 (brs, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 29.8, 32.0, 44, 7, 47.3, 52.3, 54.4, 55.7, 75.4, 114.8, 116.9, 117.0, 124.5, 126.0, 126.1, 135.7, 135.8, 137.9, 138.1, 140.1, 150.3, 154.5, 154.5, 164.1, 164.3.

(R)-4-(3-(4-Methoxyphenoxy)pyrrolidine-1-carbonyl)pyridine-1-oxide (88)

(Two rotamers, 1:1 ratio, 95%), a yellow solid; ¹H NMR (400 MHz, CDCl₃) δ 2.03-2.10 (m, 1H), 2.22-2.27 (m, 1H), 3.52-3.68 (m, 2H), 3.70 & 3.72 (s, 3H), 3.76-3.83 (m, 2H), 4.80-4.87 (m, 1H), 6.70-6.79 (m, 4H), 7.40 (d, J=6.4 Hz, 1H), 7.47 (d, J=6.8 Hz, 1H), 8.13-8.18 (m, 2H); ¹³C NMR (100 MHz, CDCl₃) δ 29.7, 32.1, 44.7, 47.3, 52.4, 54.4, 55.6, 75.4, 114.8, 116.9, 125.0, 125.1, 132.9, 133.0, 139.1, 150.3, 150.6, 154.4, 154.6, 165.3.

(R)-(3-(4-Methoxyphenoxy)pyrrolidin-1-yl)(pyrimidin-5-yl)methanone (89)

(Two rotamers, 1:1 ratio, 84%), a pale yellow solid; ¹H NMR (400 MHz, CDCl₃) δ 2.03-2.13 (m, 1H), 2.23-2.28 (m, 1H), 3.52-3.67 (m, 2H), 3.69 & 3.72 (s, 3H), 3.78-3.88 (m, 2H), 4.79-4.89 (m, 1H), 6.70-6.80 (m, 4H), 8.56 & 8.91 (s, 2H), 9.20 & 9.22 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 29.8, 32.1, 44.7, 52.3, 54.4, 55.6, 55.7, 75.5, 114.8, 116.9, 117.0 130.2, 130.3, 150.3, 150.6, 154.5, 154.6, 155.5, 155.6, 159.4, 159.5, 164.5.

(3,5-Dinitrophenyl)(4-hydroxypiperidin-1-yl)methanone (90)

¹H NMR (400 MHz, Acetone-d₆) δ 1.50-1.56 (m, 2H), 1.80-1.90 (m, 2H), 3.30-3.42 (m, 2H), 3.63 (brs, 1H), 3.94-4.05 (m, 3H), 8.61 (d, J=2.0 Hz, 2H), 8.95 (d, J=2.0 Hz, 1H); ¹³C NMR (100 MHz, Acetone-d₆) δ 33.7, 34.5, 39.5, 44.9, 66.0, 119.1, 127.4, 140.2, 148.8, 165.1.

Methyl 4-(1-(3,5-dinitrobenzoyl)piperidin-4-yloxy)benzoate (91)

¹H NMR (400 MHz, Acetone-d₆) δ 1.84 (brs, 2H), 1.96 (brs, 2H), 3.31 (brs, 1H), 3.59-3.74 (m, 2H), 3.77 (s, 3H), 3.84-3.96 (m, 1H), 4.63-4.66 (m, 1H), 6.81-6.85 (m, 2H), 7.87-7.90 (m, 2H), 8.50 (d, J=2.0 Hz, 2H), 8.97 (d, J=2.0 Hz, 1H).

(3,5-Dinitrophenyl)(4-(4-methoxyphenoxy)piperidin-1-yl)methanone (92)

¹H NMR (400 MHz, CDCl₃) δ 1.85-1.98 (m, 4H), 3.35 (brs, 1H), 3.68-3.80 (m, 2H), 3.73 (s, 3H), 3.93 (brs, 1H), 4.49 (brs, 1H), 6.79 (d, J=8.4 Hz, 2H), 6.84 (d, J=8.4 Hz, 2H), 8.57 (s, 2H), 9.03 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 30.0, 31.2, 39.3, 44.6, 55.8, 71.9, 115.0, 117.9, 119.8, 127.5, 139.6, □ 148.7, 150.8, 154.6, 165.4.

N-(4-(1-(3,5-Dinitrobenzoyl)piperidin-4-yloxy)phenyl)acetamide (93)

¹H NMR (400 MHz, DMSO-d₆) δ 1.62-1.96 (m, 4H), 1.97 (s, 3H), 3.48 (m, 3H), 3.93 (brs, 1H), 4.56 (s, 1H), 6.89 (d, J=8.4 Hz, 2H), 7.44 (d, J=8.4 Hz, 2H), 8.64 (s, 2H), 8.33 (s, 1H), 9.74 (s, 1H);

(3,5-Dinitrophenyl)(4-(2-fluorophenoxy)piperidin-1-yl)methanone (94)

¹H NMR (400 MHz, DMSO-d₆) δ 1.70-2.10 (m, 4H), 3.39-4.11 (m, 4H), 4.59 (m, 1H), 6.86-6.92 (m, 1H), 7.01-7.15 (m, 3H), 8.60 (d, J=2.0 Hz, 2H), 8.89 (d, J=2.0 Hz, 1H); ¹³C NMR (100 MHz, DMSO-d₆) δ31.1, 31.9, 45.5, 49.6, 75.0, 117.6 (d, □ J=18.6 Hz, due to F), 119.5, 120.5, 123.3 (d, J=6.7 Hz, due to F), 126.0 (d, J=3.7 Hz, due to F), 128.6, 140.6, 146.1, 149.8, 154.8 (d, J=242.6 Hz, due to F), 166.9.

(3,5-Dinitrophenyl)(4-(2-methoxyphenyl)piperazin-1-yl)methanone (95)

¹H NMR (400 MHz, Acetone-d₆) δ 3.02-3.12 (m, 4H), 3.62 (brs, 2H), 3.82 (s, 3H), 3.87 (brs, 2H), 6.85-6.95 (m, 4H), 8.68 (d, J=2.0 Hz, 2H), 8.96 (d, J=2.4 Hz, 1H); LC-MS (ESI, m/z): 387 [M+H]⁺.

(3,5-Dinitrophenyl)(4-(4-methoxyphenyl)piperazin-1-yl)methanone (96)

¹H NMR (400 MHz, Acetone-d₆) δ 3.08-3.17 (m, 4H), 3.68 (brs, 2H), 3.71 (s, 3H), 3.88 (brs, 2H), 6.82 (d, J=8.8 Hz, 2H), 6.93, (d, J=8.8 Hz, 2H), 8.69 (d, J=2.0 Hz, 2H), 8.98 (d, J=2.0 Hz, 1H); ¹³C NMR (100 MHz, Acetone-d₆) δ 42.4, 47.7, 50.5, 50.9, 54.9, 114.4, 118.8, 119.3, 127.7, 139.9, □ 145.6, 148.8, 154.5, 165.2; LC-MS (ESI, m/z): 387 [M+H]⁺.

(4-(2-chlorophenyl)piperazin-1-yl)(3,5-dinitrophenyl)methanone (97)

¹H NMR (400 MHz, Acetone-d₆) δ 3.09-3.17 (m, 4H), 3.70 (brs, 2H), 3.94 (brs, 2H), 7.07 (t, J=7.6 Hz, 1H), 7.18 (d, J=8 Hz, 1H), 7.30 (t, J=8 Hz, 1H), 7.41 (d, J=8 Hz, 1H), 8.72 (s, 1H), 9.00 (s, 1H); ¹³C NMR (100 MHz, Acetone-d₆) δ 43.3, 48.7, 51.6, 52.1, 120.0, 122.0, □ 125.3, 128.5, 128.9, 129.4, 131.4, 140.6, 149.6, 149.8, 166.1; LC-MS (ESI, m/z): 391 [M+H]⁺.

General Procedure for the Synthesis of t-butyl-benzyloxypyrrolidine-1-carboxylate (D1)

To a solution of (R)-tert-butyl 3-hydroxypyrrolidine-1-carboxylate (3.2 mmol) in dimethyl formamide (10 mL) was added sodium hydride (3.2 mmol) and benzyl bromide (3.2 mmol) at 0° C. and the resulting mixture was stirred at room temperature. After stirring overnight, distilled water (50 mL) was added and the resulting precipitate was collected by filtration to afford D1.

General Procedure for the Synthesis of benzyloxy-pyrrolidinyl-phenylmethanone (D2)

D1 (0.43 mmol) was dissolved in trifluoro acetic acid (5 mL) and stirred at room temperature. After 1 h, the reaction mixture was concentrated in vacuo to afford an amine. To a solution of the amine in methylene chloride (5 mL) was added triethylamine (0.51 mmol) and a benzoylchloride (0.51 mmol) at 0° C. and the resulting mixture was stirred at room temperature. After 3 h, the reaction mixture was diluted with methylene chloride (30 mL) and washed with 1 M HCl aqueous solution (30 mL), saturated Na₂CO₃ aqueous solution (30 mL) and brine (30 mL). The organic layer was dried over anhydrous MgSO₄ and concentrated in vacuo. The crude product was purified by silica gel flash column chromatography (3:1 hexanes/ethyl acetate) and recrystallized from a mixture of hexanes and ethyl acetate to give D2.

(R)-(3-(Benzyloxy)pyrrolidin-1-yl)(3,5-dinitrophenyl)methanone (98)

(Two rotamers, 1:1 ratio, 23%), a white solid; ¹H NMR (400 MHz, CDCl₃) δ 2.18-2.29 (m, 2H), 3.53-3.58 (m, 1H), 3.76-3.93 (m, 3H), 5.12-5.37 (m, 3H), 7.34-7.44 (m, 5H), 8.67 & 8.73 (d, J=1.6 Hz, 2H), 9.08 & 9.09 (d, J=1.6 Hz, 1H).

((R)-3-(3-Chlorobenzyloxy)pyrrolidin-1-yl)(3,5-dinitrophenyl)methanone (99)

(Two rotamers 3:1 ratio, 75%); ¹H NMR (400 MHz, CDCl₃) δ 1.93-2.21 (m, 2H), 3.38-3.83 (m, 4H), 4.13-4.47 (m, 1H), 4.99 & 5.07 (s, 1H), 5.17 & 5.29 (s, 1H), 7.07-7.29 (m, 4H), 8.64 & 8.69 (s, 2H), 8.98 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 29.8, 32.2, 45.1, 47.6, 52.3, 54.8, 70.3, 70.4, 76.4, 78.0, 120.0, 120.1, 125.5, 125.6, 127.5, 127.7, 127.8, 127.9, 128.1, 129.9, 134.5, 134.6, 139.7, 139.8, 139.9, 148.5, 164.7, 164.8.

((R)-3-(2-Fluorobenzyloxy)pyrrolidin-1-yl)(3,5-dinitrophenyl)methanone (100)

(Two rotamers 1:1 ratio), ¹H NMR (400 MHz, CDCl₃) δ 2.02-2.30 (m, 2H), 3.50 & 3.52 (s, 1H), 3.63-3.94 (m, 3H), 4.24 & 4.33 (s, 1H), 4.48 & 4.56 (d, J=12.0 Hz, 1H), 4.65 (s, 1H), 6.99-7.44 (m, 4H), 8.69 & 8.75 (s, 2H), 9.10 (s, 1H).

((R)-3-(3-(Trifluoromethyl)benzyloxy)pyrrolidin-1-yl)(3,5-dinitrophenyl)methanone (101)

(Two rotamers 2:1 ratio), ¹H NMR (400 MHz, CDCl₃) δ 2.06-2.29 (m, 2H), 3.53 & 3.55 (s, 1H), 3.78-3.96 (m, 3H), 4.27 & 4.35 (s, 1H), 4.51 & 4.62 (d, J=12.4 Hz, 1H), 4.65 (s, 1H), 7.47-7.62 (m, 4H), 8.69 & 8.74 (s, 2H), 9.07 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 29.7, 32.1, 45.1, 47.7, 52.4, 54.9, 70.4, 70.5, 76.7, 78.2, 120.1, 124.1, 124.3, 124.83, 124.87, 127.7, 127.8, 129.2, 130.8, 130.9, 138.7, 138.8, 139.7, 139.8, 148.5, 165.0.

(R)-(3,5-Dinitrophenyl)(3-(pyridin-4-ylmethoxy)pyrrolidin-1-yl)methanone (102)

(Two rotamers, 1:1 ratio, 75%), a brown oil; ¹H NMR (400 MHz, CDCl₃) δ 1.99-2.24 (m, 2H), 3.49-3.92 (m, 4H), 4.20-4.28 (m, 1H), 4.41-4.61 (m, 2H), 7.14-7.24 (m, 2H), 8.49-8.56 (m, 2H), 8.67 & 8.70 (d, J=1.6 Hz, 2H), 9.04 (d, J=1.6 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 29.7, 32.3, 45.1, 47.6, 52.3, 54.8, 69.4, 69.5, 76.9, 78.5, 120.1, 121.6, 121.7, 121.8, 127.7, 127.8, 139.8, 139.9, 146.6, 146.8, 148.5, 150.1, 150.2, 164.7.

General Procedure for the Synthesis of aminopyrrolidinyl-phenyl-methanone (E3)

To a solution of (S)-(+)-N-Boc-3-pyrrolidinol (2.67 mmol) and triethylamine (4.01 mmol) in methylene chloride (50 mL) was added methansulfonyl chloride (4.01 mmol) under ice-bath and the resulting mixture was further stirred at 4° C. After 2 h, the residue was diluted with methylene chloride (50 mL) and washed with water (100 mL) and brine (100 mL). The organic layer was dried over anhydrous MgSO₄ and concentrated in vacuo. The crude product was purified by silica gel flash column chromatography (2:1 hexanes/ethyl acetate) to give E1.

A solution of E1 (0.75 mmol) and an amine (3.75 mmol) was stirred at 100° C. After stirring overnight, the residue was dissolved in methylene chloride (30 mL) and washed with water (30 mL) and brine (30 mL). The organic layer was dried over anhydrous MgSO₄ and concentrated in vacuo. The crude product was purified by silica gel flash column chromatography (1:1 hexanes/ethyl acetate) to give E2.

To a solution of E2 (0.96 mmol) in methylene chloride (20 mL) was added trifluoroacetic acid (0.5 mL). After 3 h, the solvent was removed in vacuo. The reaction mixture was dissolved in methylene chloride (20 mL) and cooled to 0° C. Triethylamine (4.83 mmol) and a benzoyl chloride (1.05 mmol) was added. After 2 h, the residue was diluted with methylene chloride (20 mL) and washed with water (40 mL) and brine (40 mL). The organic layer was dried over anhydrous MgSO₄ and concentrated in vacuo. The crude was purified by silica gel flash column chromatography (1:1 hexanes/ethyl acetate) to give E3.

(R)-(3,5-Dinitrophenyl)(3-(4-methoxyphenylamino)pyrrolidin-1-yl)methanone (103)

(Two rotamers, 1:1 ratio, 63%), a brown solid; ¹H NMR (400 MHz, CDCl₃+CD₃OD) δ 1.93-2.01 (m, 1H), 2.14-2.30 (m, 1H), 3.26-3.30 & 3.44-3.50 (m, 1H), 3.54-3.72 (m, 2H), 3.61 & 3.68 (s, 3H), 3.80-3.91 (m, 1H), 3.95-4.05 (m, 1H), 6.43 & 6.55 (d, J=8.8 Hz, 2H), 6.62 & 6.70 (d, J=8.8 Hz, 2H), 8.58 & 8.67 (d, J=2.4 Hz, 2H), 8.95-8.99 (m, 1H); ¹³C NMR (100 MHz, CDCl₃+CD₃OD) δ 30.4, 32.4, 45.2, 47.9, 52.6, 53.0, 54.4, 55.0, 55.8, 55.9, 115.0, 115.1, 115.2, 115.3, 120.1, 127.6, 127.7, 139.6, 140.5, 140.7, 148.5, 148.6, 152.8, 152.9, 165.2, 165.4.

(R)-(3-(4-Butoxyphenylamino)pyrrolidin-1-yl)(3,5-dinitrophenyl)methanone (104)

(Two rotamers, 1:1 ratio, 54%), a brown solid; m.p. 118-120° C.; ¹H NMR (400 MHz, CDCl₃) δ 0.83-0.98 (m, 3H), 1.39-1.52 (m, 2H), 1.61-1.76 (m, 2H), 2.02-2.05 (m, 1H), 2.24-2.41 (m, 1H), 3.33-3.37 & 3.50-3.63 (m, 2H), 3.66-4.13 (m, 6H), 6.47 & 6.60 (d, J=8.4 Hz, 2H), 6.70 & 6.78 (d, J=8.4 Hz, 2H), 8.66 & 8.74 (s, 2H), 9.05 & 9.08 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 14.0, 14.1, 19.4, 19.5, 30.9, 31.6, 31.7, 32.9, 45.3, 47.9, 52.8, 53.4, 54.6, 55.2, 68.5, 68.6, 115.0, 115.2, 116.0, 116.2, 120.2, 127.8, 127.9, 139.9, 140.1, 140.4, 148.6, 152.7, 164.9, 165.1.

(R)-(3,5-Dinitrophenyl)(3-(4-phenoxyphenylamino)pyrrolidin-1-yl)methanone (105)

(Two rotamers, 1:1 ratio, 60%), a brown solid; ¹H NMR (400 MHz, CDCl₃+CD₃OD) δ 2.00-2.06 (m, 1H), 2.18-2.35 (m, 1H), 3.32-3.35 & 3.48-3.54 (m, 1H), 3.61-3.78 (m, 2H), 3.82-4.12 (m, 2H), 6.47 & 6.60 (d, J=8.8 Hz, 2H), 6.77-6.97 (m, 5H), 7.17, 7.24 (m, 2H), 8.63 & 8.69 (d, J=1.6 Hz, 2H), 9.01 & 9.04 (s, 1H); ¹³C NMR (100 MHz, CDCl₃+CD₃OD) δ 30.6, 32.5, 45.3, 47.9, 52.3, 53.0, 54.0, 55.1, 114.5, 114.8, 117.4, 117.5, 120.2, 121.3, 121.4, 122.4, 122.5, 127.7, 127.8, 129.7, 139.6, 142.8, 143.0, 148.6, 148.8, 165.2, 165.3.

(R)-(3,5-Dinitrophenyl(3-(4-hydroxyphenylamino)pyrrolidin-1-yl)methanone (106)

(Two rotamers, 1:1 ratio, 83%), a yellow solid; ¹H NMR (400 MHz, DMSO-d₆) δ 1.78-1.89 (m, 1H), 2.03-2.15 (m, 1H), 3.12-3.17 (m, 1H), 3.37-3.45 (m, 1H), 3.52-3.95 (m, 3H), 5.15-5.23 (m, 1H), 6.36-6.56 (m, 4H), 8.38 & 8.44 (brs, 1H), 8.64 & 8.67 (s, 2H), 8.81 & 8.84 (s, 1H); ¹³C NMR (100 MHz, DMSO-d₆) δ 29.6, 31.3, 44.6, 46.9, 51.6, 51.9, 53.3, 54.1, 113.8, 114.2, 115.6, 115.7, 119.4, 127.4, 127.5, 139.6, 139.7, 140.3, 140.4, 148.0, 148.1, 148.5, 148.7, 164.2.

(R)-(3,5-Dinitrophenyl)-3-(phenylamino)pyrrolidin-1-yl)methanone (107)

(Two rotamers, 1:1 ratio, 80%), a red solid; ¹H NMR (400 MHz, CDCl₁₃+CD₃OD) δ 1.99-2.04 (m, 1H), 2.17-2.33 (m, 1H), 3.28-3.31 & 3.57-3.95 (m, 4H), 4.04-4.11 (m, 1H), 6.46-6.48 (m, 1H), 6.59-6.70 (m, 2H), 7.02-7.14 (m, 2H), 8.60 & 8.67 (s, 2H), 8.98 & 9.01 (s, 1H); ¹³C NMR (100 MHz, CDCl₃+CD₃OD) δ 30.3, 32.2, 45.1, 47.8, 51.7, 52.8, 53.3, 54.9, 113.2, 113.5, 118.3, 118.4, 120.0, 127.6, 127.7, 129.4, 139.5, 146.3, 146.4, 148.4, 148.5, 165.1, 165.3.

(R)-(3,5-Dinitrophenyl)(3-(pyridin-2-ylamino)pyrrolidin-1-yl)methanone (108)

(Two rotamers, 1:1 ratio, 70%), a yellow solid; ¹H NMR (400 MHz, CDCl₃) δ 2.00-2.44 (m, 2H), 3.38-4.11 (m, 4H), 4.38 & 4.50 (m, 1H), 6.36 & 6.44 (d, J=8.4 Hz, 1H), 6.57 & 6.64 (t, J=6.0 Hz, 1H), 7.37 & 7.44 (t, J=7.8 Hz, 1H), 7.98 & 8.11 (d, J=5.2 Hz, 1H), 8.67 & 8.73 (s, 2H), 9.05 & 9.09 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 30.4, 32.6, 45.1, 47.7, 51.7, 52.9, 55.3, 76.7, 101.8, 108.3, 113.7, 119.9, 127.7, 137.5, 137.7, 147.8, 147.9, 148.3, 148.4, 157.2, 157.4, 164.8, 164.9.

(R)-(3-(Cyclohexylamino)pyrrolidin-1-yl)(3,5-dinitrophenyl)methanone (109)

(Two rotamers, 1:1 ratio, 69%), a pale yellow solid; ¹H NMR (400 MHz, CDCl₃+CD₃OD) δ 0.99-1.35 (m, 6H), 1.60-1.98 (m, 5H), 2.15-2.32 (m, 1H), 2.39-2.57 (m, 1H), 3.24-3.60 (m, 2H), 3.63-3.73 (m, 2H), 3.81-3.91 (m, 1H), 8.73 & 8.78 (s, 2H), 9.10 (s, 1H); ¹³C NMR (100 MHz, CDCl₃+CD₃OD) δ 24.7, 24.8, 24.9, 25.6, 25.7, 30.6, 32.4, 33.3, 33.4, 45.2, 47.7, 52.6, 54.5, 54.8, 54.9, 55.1, 119.7, 127.4, 127.5, 139.5, 148.3, 164.9, 165.0.

(R)—N-Cyclohexyl-N-(1-(3,5-dinitrobenzoyl)pyrrolidin-3-yl)-3,5-dinitrobenzamide (110)

(Two rotamers, 1:1 ratio, 15%), a white solid; ¹H NMR (400 MHz, CDCl₃) δ 1.01-1.22 (m, 3H), 1.62-1.86 (m, 6H), 2.18-2.26 (m, 1H), 2.74-2.89 (m, 1H), 3.30-3.35 (m, 1H), 3.50-3.78 (m, 2H), 3.97-4.19 (m, 4H), 8.51 & 8.56 (s, 2H), 8.74 (s, 2H), 9.09-9.10 (m, 2H); ¹³C NMR (100 MHz, CDCl₃) δ 24.8, 24.9, 25.3, 25.5, 27.3, 30.0, 31.8, 45.6, 48.7, 48.9, 50.0, 53.6, 54.8, 60.5, 119.8, 120.0, 126.7, 127.8, 139.8, 140.1, 140.2, 140.4, 148.6, 148.2, 164.4, 164.7, 166.6, 166.7.

(R)-(3-(4-Methoxyphenylamino)pyrrolidin-1-yl)(phenyl)methanone (111)

(Two rotamers, 1:1 ratio, 75%), a pale yellow solid; ¹H NMR (400 MHz, CDCl₃) δ 1.84-1.88 (m, 1H), 2.08-2.32 (m, 1H), 3.26-3.34 & 3.49-4.03 (m, 5H), 3.69 & 3.72 (s, 3H), 6.48 & 6.50 (d, J=6.4 Hz, 2H), 6.71 & 6.76 (d, J=6.4 Hz, 2H), 7.36-7.51 (m, 5H); ¹³C NMR (100 MHz, CDCl₃) δ 30.7, 32.5, 44.5, 47.7, 52.6, 52.7, 54.2, 55.2, 55.8, 55.9, 114.7, 114.9, 115.0, 127.2, 128.3, 130.1, 136.7, 140.8, 141.0, 152.6, 170.0.

(R)-(3-(3-Chlorobenzylamino)pyrrolidin-1-yl)(3,5-dinitrophenyl)methanone (112)

(Two rotamers, 1:1 ratio, 32%) as a pale yellow solid; ¹H NMR (400 MHz, CDCl₃+CD₃OD) δ 1.83-1.89 (m, 1H), 2.01-2.08 & 2.14-2.19 (m, 1H), 2.75 (brs, 1H), 3.15-3.19 & 3.35-3.83 (m, 7H), 7.05-7.23 (m, 4H), 8.58 & 8.67 (d, J=2.0 Hz, 2H), 8.97-8.99 (m, 1H); ¹³C NMR (100 MHz, CDCl₃+CD₃OD) δ 30.4, 32.1, 45.2, 47.7, 51.2, 51.4, 52.4, 54.9, 55.2, 57.5, 119.8, 126.0, 126.2, 127.2, 127.3, 127.5, 127.6, 127.8, 128.0, 129.7, 129.8, 134.1, 134.2, 139.5, 139.6, 141.3, 141.7, 148.2, 148.3, 164.7, 164.8.

(R)—N-(3-Chlorobenzyl)-N-(1-(3,5-dinitrobenzoyl)pyrrolidin-3-yl)-3,5-dinitrobenzamide (113)

(Two rotamers, 1:1 ratio, 44%), a white solid; ¹H NMR (400 MHz, CDCl₃) δ 2.26-2.35 (m, 2H), 3.56-4.05 (m, 4H), 4.57-4.65 (m, 3H), 7.06-7.15 (m, 2H), 7.24-7.35 (m, 2H), 8.50-8.62 (m, 4H), 8.97-9.02 (m, 2H); LC-MS (ESI, m/z): 599 [M+H]⁺.

(R)-(3-(Benzylamino)pyrrolidin-1-yl)(3,5-dinitrophenyl)methanone (114)

¹H NMR (400 MHz, CDCl₃) δ 1.59 (brs, 1H), 1.87-1.94 (m, 1H), 2.06-2.24 (m, 1H), 3.20 (dd, J=4.8, 10.4 Hz, 0.5H), 3.46-3.89 (m, 6.5H), 7.15-7.36 (m, 5H), 8.63 (d, J=2.0 Hz, 1H), 8.71 (d, J=2.0 Hz, 111), 9.03 (t, J=2.0 Hz, 0.5H), 9.06 (t, J=2.0 Hz, 0.5H).

(R)-(3,5-Dinitrophenyl)(3-(3-(trifluoromethyl)benzylamino)pyrrolidin-1-yl)methanone (115)

¹H NMR (400 MHz, CDCl₃) δ 1.51 (brs, 1H), 1.89-1.94 (m, 1H), 2.10-2.28 (m, 1H), 3.24 (dd, J=5.2, 10.0 Hz, 0.5H), 3.45-3.92 (m, 6.5H), 7.40-7.61 (m, 4H), 8.65 (d, J=2.0 Hz, 1H), 8.72 (d, J=2.0 Hz, 1H), 9.06 (t, J=2.0 Hz, 0.5H), 9.08 (t, J=2.0 Hz, 0.5H).

(R)-(3,5-Dinitrophenyl)-3-(2-fluorobenzylamino)pyrrolidin-1-yl)methanone (116)

(Two rotamers, 1:1 ratio, 75%), a yellow solid; ¹H NMR (400 MHz, CDCl₃) δ 1.89-1.94 (m, 1H), 2.11-2.25 (m, 1H), 3.22-3.89 (m, 7H), 6.93 & 7.02 (t, J=8.6 Hz, 2H), 7.20 & 7.33 (m, 2H), 8.66 & 8.72 (d, J=2.0 Hz, 2H), 9.06 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 30.7, 32.5, 45.3, 47.8, 51.3, 51.5, 52.7, 55.1, 55.4, 57.7, 115.1, 115.3, 119.8, 119.9, 127.6, 127.7, 129.4, 129.6, 135.4, 135.5, 139.8, 148.3, 148.4, 162.0 (d, J=245 Hz, due to F), 162.1 (d, J=245 Hz, due to F), 164.5, 164.6.

(R)-(3,5-Dinitrophenyl)(3-(2-fluorobenzylamino)pyrrolidin-1-yl)methanone hydrochloride (117)

(Two rotamers, 1:1 ratio, 92%), a white solid; ¹H NMR (400 MHz, CD₃OD+D₂O) δ 2.24-2.35 (m, 1H), 2.48-2.63 (m, 1H), 3.48-4.34 (m, 7H), 7.13 & 7.24 (t, J=8.6 Hz, 2H), 7.47 & 7.58 (q, J=7.0 Hz, 2H), 8.73 & 8.8 (d, J=2.0 Hz, 2H), 9.16 (brs, 1H); ¹³C NMR (100 MHz, CD₃OD+D₂O) δ 28.1, 29.7, 45.5, 50.6, 50.7, 51.9, 56.6, 57.7, 81.1, 117.0, 117.1, 127.7, 128.6, 128.7, 133.2, 133.3, 139.0, 147.1, 149.7, 167.5, 167.6.

(R)-(3,5-Dinitrophenyl)(3-(pyridin-4-ylmethylamino)pyrrolidin-1-yl)methanone (118)

(Two rotamers, 1:1 ratio, 69%), a yellow solid; ¹H NMR (400 MHz, CDCl₃) δ 1.80 (br, 1H), 1.88-2.23 (m, 2H), 3.23-3.89 (m, 7H), 7.17 & 7.26 (d, J=5.2 Hz, 2H), 8.45 & 8.52 (d, J=5.6 Hz, 2H), 8.65 & 8.69 (d, J=2.0 Hz, 2H), 9.04 (t, J=2.0 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 30.2, 32.4, 44.7, 47.7, 52.4, 54.8, 55.9, 76.0, 115.0, 115.1, 117.2, 117.4, 124.4, 124.5, 127.0, 129.1, 130.6, 130.8, 137.5, 137.7, 150.8, 151.0, 154.7, 154.8, 168.5, 168.8.

General Procedure for the Synthesis of (R)—N-benzoylpyrrolidinyl-benzamide (F5)

To a solution of F1 (3.77 mmol) in DMF (15 mL) was added sodium azide (11.00 mmol) and the resulting mixture was warmed to 70° C. After 3 h, the solvent was removed in vacuo, dissolved in ethylacetate (50 mL) and washed with water (50 mL) and brine (50 mL). The organic layer was dried over anhydrous MgSO₄ and concentrated in vacuo. The crude product was purified by silical gel flash column chromatography (1:1 hexanes/ethyl acetate) to give F2.

To a solution of F2 (2.68 mmol) was added 10% palladium on activated carbon and stirred overnight under hydrogen atmosphere. The reaction mixture was filtered using cellite 545 and the resulting filtrate was concentrated in vacuo to give F3.

To a solution of F3 (0.77 mmol) and triethylamine (1.16 mmol) in methylene chloride (10 mL) was added benzoyl chloride (1.00 mmol) under ice bath. The reaction mixture was brought up to room temperature. After 2 h, the reaction mixture was diluted with methylene chloride (20 mL) and washed with water (30 mL) and brine (30 mL). The organic layer was dried over anhydrous MgSO₄ and concentrated in vacuo. The crude product was purified by silica gel flash column chromatography (2:1 hexanes/ethyl acetate) to give F4.

To a solution of F4 (0.59 mmol) in methylene chloride (10 mL) was added trifluoroacetic acid (0.5 mL) and stirred at room temperature. After 3 h, the solvent was removed in vacuo. The crude product was dissolved in methylene chloride (10 mL) and triethylamine (0.41 mL, 2.96 mmol) was added. The reaction mixture was cooled to 0° C. and then 3,5-dichlorobenzoyl chloride (0.65 mmol) was added. The resulting mixture was brought up to room temperature. After 2 h, the solvent was removed in vacuo and the crude residue was purified by silica gel flash column chromatography (1:1 hexanes/ethyl acetate) to give F5.

(R)—N-(1-(3,5-Dinitrobenzol)pyrrolidin-3-yl)-3-(trifluoromethoxy)benzamide (119)

(Two rotamers, 1:1 ratio, 67%), a pale yellow solid; ¹H NMR (400 MHz, CDCl₃) δ 2.07-2.18 (m, 1H), 2.29-2.40 (m, 1H), 3.49-3.60 (m, 1H), 3.68-3.76 (m, 1H), 3.87-3.98 (m, 2H), 4.60-4.74 (m, 1H), 7.19-7.60 (m, 5H), 8.51 & 8.59 (s, 2H), 8.91 & 8.96 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 29.9, 32.5, 45.3, 48.0, 49.2, 50.8, 51.9, 54.8, 119.9, 120.0, 120.2, 124.3, 125.7, 127.6, 130.2, 135.7, 136.0, 139.4, 148.4, 148.5, 149.2, 164.9, 165.0, 166.5, 166.6.

(R)—N-(1-(3,5-Dinitrobenzoyl)pyrrolidin-3-yl)-4-methoxybenzamide (120)

(Two rotamers, 1:1 ratio, 0.19 g, 76%), a white solid; ¹H NMR (400 MHz, CDCl₃) δ 2.08-2.15 (m, 1H), 2.35-2.47 (m, 1H), 3.47-4.08 (m, 4H), 3.81 & 3.84 (s, 3H), 4.62-4.64 & 4.77-4.78 (m, 1H), 6.45 & 6.50 (brs, 1H), 6.82 & 6.88 (d, J=8.4 Hz, 2H), 7.62 & 7.72 (d, J=8.4 Hz, 2H), 8.62 & 8.71 (s, 2H), 9.04 & 9.08 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ□ 30.0, 32.8, 45.2, 48.0, 48.9, 50.5, 52.2, 55.2, 55.6, 60.6, 113.9, 120.2, 125.6, 126.1, 127.7, 127.8, 129.0, 139.5, 148.5, 162.7, 164.9, 165.0, 167.4.

(R)-3-Chloro-N-(1-(3,5-dinitrobenzoyl)pyrrolidin-3-yl)benzamide (121)

(Two rotamers, 1:1 ratio, 66%), a pale yellow solid; ¹H NMR (400 MHz, DMSO-d₆) δ 1.94-2.20 (m, 2H), 3.33-3.83 (m, 4H), 4.42-4.55 (m, 1H), 7.43-7.60 (m, 2H), 7.71-7.90 (m, 2H), 8.66 & 8.69 (d, J=2.0 Hz, 2H, brs, 1H), 8.83-8.86 (m, 1H); ¹³C NMR (100 MHz, DMSO-d₆) δ 29.3, 31.5, 44.6, 47.0, 48.4, 49.9, 51.1, 53.3, 119.4, 119.5, 126.2, 126.3, 127.0, 127.1, 127.5, 130.2, 130.3, 131.1, 133.0, 133.1, 136.1, 136.3, 139.5, 139.6, 148.0, 164.0, 164.1, 165.0, 165.1.

(S)-1-(3,5-Dinitrobenzoyl)pyrrolidin-3-yl methanesulfonate (122)

(Two rotamers, 1:1 ratio, 92%), a white solid; m.p. 138-140° C.; ¹H NMR (400 MHz, CDCl₃) δ 2.25-2.46 (m, 2H), 3.03 & 3.10 (s, 3H), 3.59-3.67 & 3.75-4.03 (m, 4H), 5.28-5.40 (m, 1H), 8.68 & 8.73 (s, 2H), 9.08 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 31.1, 33.6, 38.9, 39.0, 44.7, 47.2, 53.3, 55.3, 78.2, 78.6, 120.5, 127.8, 127.9, 139.3, 148.7, 164.8, 165.0; LC-MS (ESI, m/z): 360 [M+H]⁺.

(R)-1-(3,5-Dinitrobenzoyl)pyrrolidin-3-yl methanesulfonate (123)

(Two rotamers, 1:1 ratio, 89%), a white solid; ¹H NMR (400 MHz, CDCl₃+CD₃OD) δ 2.16-2.32 (m, 2H), 2.94 & 3.02 (s, 3H), 3.50-3.91 (m, 4H), 5.19-5.30 (m, 1H), 8.58 & 8.63 (s, 2H), 8.97 (s, 1H); ¹³C NMR (100 MHz, CDCl₃+CD₃OD) δ 30.7, 33.1, 38.3, 38.4, 44.5, 46.9, 53.0, 55.0, 78.5, 79.0, 120.1, 127.6, 139.0, 148.4, 164.9, 165.0.

Example 7 Derivatization of the Pyridopyrimidinone Compounds

The pyridopyrimidinone compounds (scaffold VIII; see Table 2) underwent derivatization according to the methods outlined below (Schemes 8-10). Resulting derivatives were examined for inhibitory activity using the assay described above and the results are summarized in Table 3.

General Procedure for the Synthesis of G1

2-Amino-3-picoline (1.0 mmol) was dissolved in diethyl malonate (1.0 mmol). The solution was heated to 1701′ for 12 h. After cooling, the dark residue was triturated with CH₂Cl₂ (10 mL). The residual pale solid was collected by filtration and washed with CH₂Cl₂ to give G1.

General Procedure for the Synthesis of G2

To a DMF (2.0 mL) was added POCl₃ (3.0 mmol) at 0° C. After the mixture was stirred at 0 for 40 min, a solution of G1 (1.0 mmol) in DMF (2.0 mL) was added and stirred at 80° C. for 1 h. The mixture was cooled and concentrated in vacuo. The residue was diluted with water and extracted with CH₂Cl₂ (10 mL×3). The combined organic layers were washed with brine, dried over MgSO₄ and concentrated. The residue was purified by flash column chromatography to give G2.

General Procedure for the Synthesis of G3

To a stirred solution of G2 (1.0 mmol) in THF (2.0 mL) was added Et₃N (2.0 mmol). The mixture was cooled to 0° C. After 5 min, an amine (1.0 mmol) was added dropwise and the mixture was stirred at room temperature overnight. The reaction mixture was diluted with CH₂Cl₂ (10 mL) and washed with brine (10 mL). The organic layer was dried over anhydrous MgSO₄ and concentrated in vacuo. The crude product was purified by flash column chromatography to give G3.

General Procedure for the Synthesis of G4

G2 (0.5 mmol) was dissolved in 10.4 mL of tert-butyl alcohol and 2.5 mL of 2-methyl-2-butene. A solution of sodium chlorite (4.59 mmol) and sodium dihydrogenphosphate (3.46 mmol) in 4.2 mL of water was added dropwise. The reaction mixture was stirred at room temperature overnight. Volatile components were then removed under vacuum, and the residue was dissolved in 10 ml of water and extracted with two 10 ml portions of hexane. The aqueous layer was acidified to pH=3 with HCl(aq) and extracted with 10 mL portions of methylene chloride. The combined organic layers were washed with 20 mL of cold water, dried and concentrated to give G4.

General Procedure for the Synthesis of G5 from G3

G3 (36.6 μmol) was dissolved in 760 μl of tert-butyl alcohol and 180 μl of 2-methyl-2-butene. A solution of sodium chlorite (335 μmol) and sodium dihydrogenphosphate (253 μmol) in 300 μl of water was added dropwise. The reaction mixture was stirred at room temperature overnight. Volatile components were then removed under vacuum and the residue was dissolved in 10 ml of water and extracted with two 10 ml portions of hexane. The aqueous layer was acidified to pH=3 with HCl(aq) and extracted with 10 ml portions of methylene chloride. The combined organic layers were washed with 20 ml of cold water, dried and concentrated to give G5.

General Procedure for the Synthesis of G5 from G4

To a stirred solution of G4 (1.0 mmol) in DMF (2.0 mL) was added Et₃N (2.0 mmol) and amine (1.5 mmol) and the mixture was stirred at 60° C. overnight. The reaction mixture was diluted with CH₂Cl₂ (10 mL) and washed with brine (10 ml). The organic layer was dried over anhydrous MgSO₄ and concentrated in vacuo. The crude product was purified by recrystallization from a mixture of hexanes and methylene chloride to give G5.

General Procedure for the Synthesis of G6

The solution of 2-amino-3-picoline (4.0 mmol) in a solution of CH₂Cl₂ (3 mL) and dried pyridine (1 mL) was added dropwise at room temperature to a stirred solution of ethyl 3-chloro-3-oxo-propionate (5.3 mmol) in CH₂Cl₂ (3 mL) (an exothermic reaction with emission of white fume occurred during the addition). The resulting warm mixture was stirred at room temperature for 30 min and then poured into 30 mL of cold water; an excess of sodium carbonate was carefully added with stirring and the mixture was further stirred at room temperature for 1 h. The organic layer was then collected and the aqueous phase was extracted several times with CH₂Cl₂. The combined organic layers were washed with water, dried over anhydrous Na₂SO₄, and concentrated in vacuo. The crude product was purified by flash column chromatography to give G6.

General Procedure for the Synthesis of G7

A mixture of G6 (1.83 mmol), POCl₃ (0.5 mL) and polyphosphoric acid (137 mg) was heated with stirring at 130° C. for 3 h. After cooling, anhydrous ethanol was added and the mixture was refluxed for 30 min, then allowed to cool. The mixture was treated with aqueous sodium carbonate and exhaustively extracted with CH₂Cl₂ (10 mL×3). The combined layers were washed with water (10 mL), brine (10 mL), dried over MgSO₄, filtered and concentrated in vacuo. The crude product was purified by flash column chromatography to give G7.

General Procedure for the Synthesis of G8

To a solution of G6 (1 mmol) in DMF (0.96 mL) was added potassium carbonate (5.0 mmol) followed by phenol (1.94 mmol). After 12 h at 100° C., the solution was allowed to cool to 23° C. The reaction mixture was washed with H₂O (50 mL), and the aqueous layer was extracted with CH₂Cl₂ (20 mL×3). The combined organic layers were washed with 1N HCl (20 mL×2), filtered, and concentrated in vacuo. The crude product was purified by flash column chromatography to give G8.

General Procedure for the Synthesis of G9

To DMF (2.0 mL) was added POCl₃ (3.0 mmol) at 0° C. After the mixture was stirred at 0° C. for 40 min, a solution of G8 (1.0 mmol) in DMF (2.0 mL) was added and stirred at 80° C. for 1 h. The mixture was cooled and concentrated in vacuo. The residue was diluted with water and extracted with CH₂Cl₂ (10 mL×3). The combined organic layers were washed with brine, dried over MgSO₄ and concentrated. The residue was purified by flash column chromatography to give G9.

Ethyl 3-(3-methylpyridin-2-ylamino)-3-oxopropanoate (124)

¹H NMR (400 MHz, CDCl₃) δ 1.25 (t, J=7.0 Hz, 3H), 2.25 (s, 3H), 3.45 (s, 2H), 4.20 (q, J=7.2 Hz, 2H), 7.47 (d, J=8.4 Hz, 1H), 8.03 (d, J=8.4 Hz, 1H), 8.07 (s, 1H), 9.67 (brs, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 13.9, 17.7, 42.6, 61.7, 113.8, 129.3, 138.8, 147.6, 148.8, 163.5, 168.4.

2-Hydroxy-9-methyl-4H-pyrido[1,2-a]pyrimidin-4-one (125)

¹H NMR (400 MHz, DMSO-d₆) δ 2.48 (s, 3H), 5.44 (s, 1H), 7.20 (t, J=7.0 Hz, 1H), 7.87 (d, J=6.8 Hz, 1H), 8.84 (d, J=6.8 Hz, 1H), 11.52 (brs, 1H).

2-Hydroxy-8-methyl-4H-pyrido[1,2-a]pyrimidin-4-one (126)

¹H NMR (400 MHz, DMSO-d₆) δ 2.50 (s, 3H), 4.88 (s, 1H), 7.20-7.24 (m, 2H), 8.85 (d, J=6.8 Hz, 1H), 11.98 (br s, 1H); ¹³C NMR (100 MHz, DMSO-d₆) δ 20.6, 80.3, 114.4, 117.1, 127.7, 146.7, 153.5, 155.3, 162.3.

2-Chloro-9-methyl-4H-pyrido[1,2-a]pyrimidin-4-one (127)

¹H NMR (400 MHz, CDCl₃) δ 2.57 (s, 3H), 6.45 (s, 1H), 7.12 (t, J=7.0 Hz, 1H), 7.68 (d, J=6.8 Hz, 1H), 8.93 (d, J=6.8 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 18.0, 102.3, 115.8, 125.7, 134.7, 136.9, 150.0, 157.6, 157.9.

2-Chloro-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carbaldehyde (128)

¹H NMR (400 MHz, CDCl₃) δ 2.64 (s, 3H), 7.30 (t, J=7.0 Hz, 1H), 7.92 (d, J=7.2 Hz, 1H), 9.10 (d, J=6.4 Hz, 1H), 10.42 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 17.7, 107.3, 117.7, 127.0, 135.6, 140.6, 150.0, 156.4, 160.2, 187.1.

2-Chloro-8-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carbaldehyde (129)

¹H NMR (400 MHz, CDCl₃) δ 2.59 (s, 3H), 7.24 (d, J=7.2 Hz, 1H), 7.52 (s, 1H), 9.09 (d, J=7.2 Hz, 1H), 10.40 (s, 1H).

2-Chloro-7-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carbaldehyde (130)

¹H NMR (400 MHz, DMSO-d₆) δ 2.32 (s, 3H), 7.49 (d, J=8.8 Hz, 1H), 7.78 (d, J=8.8 Hz, 1H), 8.79 (s, 1H), 10.16 (s, 1H).

2-Chloro-6-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carbaldehyde (131)

¹H NMR (400 MHz, CDCl₃) δ 3.11 (s, 3H), 6.98 (d, J=7.2 Hz, 1H), 7.51 (d, J=8.8 Hz, 1H), 7.79 (t, J=8.0 Hz, 1H), 10.29 (s, 1H).

9-Methyl-4-oxo-2-(phenylamino)-4H-pyrido[1,2-a]pyrimidine-3-carbaldehyde (132)

¹H NMR (400 MHz, CDCl₃) δ 2.44 (s, 3H), 6.89 (t, J=6.8 Hz, 1H), 7.11 (t, J=7.2 Hz, 1H), 7.34 (t, J=7.6 Hz, 2H), 7.62 (d, J=6.4 Hz, 1H), 7.76 (d, J=8.0 Hz, 2H), 8.80 (d, J=6.8 Hz, 1H), 10.27 (s, 1H), 11.67 (brs, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 18.1, 94.6, 113.6, 121.8, 124.2, 125.9, 128.7, 133.6, 138.1, 138.9, 152.5, 153.8, 160.2, 190.2.

2-(3-Chlorophenylamino)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carbaldehyde (133)

¹H NMR (400 MHz, CDCl₃) δ 2.50 (s, 3H), 6.97 (t, J=6.8 Hz, 1H), 7.08 (d, J=8.0 Hz, 1H), 7.25 (t, J=8.0 Hz, 1H), 7.42 (d, J=8.0H, 1H), 7.69 (d, J=6.8 Hz, 1H), 8.18 (s, 1H), 8.84 (d, J=6.8 Hz, 1H), 10.27 (s, 1H), 11.72 (brs, 1H).

9-Methyl-4-oxo-2-(3-(trifluoromethoxy)phenylamino)-4H-pyrido[1,2-a]pyrimidine-3-carbaldehyde (134)

¹H NMR (400 MHz, CDCl₃) δ 2.50 (s, 3H), 6.99 (t, J=7.0 Hz, 1H), 7.36 (t, J=8.0 Hz, 1H), 7.42 (d, J=8.0 Hz, 1H), 7.70 (d, J=6.8 Hz, 1H), 8.16 (s, 1H), 8.88 (d, J=8.0 Hz, 1H), 10.32 (s, 1H), 11.86 (brs, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 18.0, 94.7, 114.2, 114.7, 116.5, 119.7, 126.1, 129.7, 133.8, 139.4, 139.7, 149.4, 152.6, 157.0, 160.1, 190.4.

9-Methyl-4-oxo-2-(3-(trifluoromethyl)phenylamino)-4H-pyrido[1,2-a]pyrimidine-3-carbaldehyde (135)

¹H NMR (400 MHz, CDCl₃) δ 2.49 (s, 1H), 6.98 (t, J=6.8 Hz, 1H), 7.37 (d, J=7.6 Hz, 1H), 7.45 (d, J=7.6 Hz, 1H), 7.61 (d, J=8.0 Hz, 1H), 7.70 (d, J=6.0 Hz, 1H), 8.61 (s, 1H), 8.87 (d, J=6.8 Hz, 1H), 10.30 (s, 1H), 11.85 (brs, 1H).

2-(4-tert-Butylphenylamino)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carbaldehyde (136)

¹H NMR (400 MHz, CDCl₃) δ 1.32 (s, 9H), 2.48 (s, 3H), 6.89 (t, J=7.0 Hz, 1H), 7.37 (d, J=8.4 Hz, 1H), 7.62 (d, J=6.8 Hz, 1H), 7.73 (d, J=8.8 Hz, 1H), 8.81 (d, J=7.2 Hz, 1H), 10.30 (s, 1H), 11.68 (br s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 18.2, 31.3, 34.3, 94.6, 113.5, 121.4, 125.6, □ 125.9, 133.6, 135.6, 138.8, 147.2, 152.6, 156.7, 160.4, 190.2.

2-(3-Chlorobenzylamino)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carbaldehyde (137)

¹H NMR (400 MHz, CDCl₃) δ 2.40 (s, 3H), 4.80 (d, J=6.0 Hz, 2H), 6.87 (t, J=7.0 Hz, 1H), 7.24-7.26 (m, 3H), 7.37 (s, 1H), 7.59 (d, J=6.8 Hz, 1H), 8.79 (d, J=7.2 Hz, 1H), 10.34 (brs, 1H), 10.30 (s, 1H).

9-Methyl-2-morpholino-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carbaldehyde (138)

¹H NMR (400 MHz, CDCl₃) δ 2.30 (s, 3H), 3.65 (d, J=2.4 Hz, 4H), 3.72 (d, J=3.2 Hz, 4H), 6.74-6.77 (m, 1H), 7.49 (d, J=6.8 Hz, 1H), 8.62 (d, J=7.2 Hz, 1H), 10.01 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 17.6, 49.5, 67.0, 95.9, 112.9, 125.7, 133.0, 138.1, 150.5, 158.4, 162.3, 186.2

2-(4-(2-Chlorophenyl)piperazin-1-yl)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carbaldehyde (139)

¹H NMR (400 MHz, CDCl₃) δ 2.41 (s, 3H), 3.19 (t, J=4.8 Hz, 4H), 3.92 (t, J=4.6 Hz, 4H), 6.82 (t, J=7.0 Hz, 1H), 6.98 (t, J=7.6 Hz, 1H), 7.04 (d, J=7.2 Hz, 1H), 7.21 (t, J=7.6 Hz, 1H), 7.36 (d, J=7.6 Hz, 1H), 7.55 (d, J=6.4 Hz, 1H), 8.73 (d, J=6.8 Hz, 1H), 10.15 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 17.6, 49.3, 51.4, 96.1, 112.7, 120.5, 124.0, 125.8, 127.6, 128.8, 130.6, 133.0, 137.8, 148.7, 150.5, 158.6, 162.5, 186.4.

2-(3,4-Dihydroisoquinolin-2(1H)-yl)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carbaldehyde (140)

¹H NMR (400 MHz, CDCl₃) δ 2.43 (s, 3H), 3.05 (t, J=5.8 Hz, 2H), 4.03 (t, J=5.8 Hz, 2H), 4.73 (s, 2H), 6.78 (t, J=7.0 Hz, 1H), 7.06-7.17 (m, 4H), 7.52 (d, J=6.8 Hz, 1H), 8.70 (d, J=7.6 Hz, 1H), 10.21 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 17.6, 28.7, 46.3, 52.0, 96.1, 112.5, 125.8, 126.2, 126.6, 128.4, 133.0, 133.9, 134.6, 137.5, 150.3, 158.6, 162.3, 186.7.

2-(Isobutylamino)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carbaldehyde (141)

¹H NMR (400 MHz, CDCl₃) δ 0.95 (d, J=4 Hz, 6H), 1.90 (m, 1H), 2.37 (s, 3H), 3.41 (t, J=6.8 Hz, 2H), 6.76 (t, J=6.8 Hz, 1H), 7.24-7.52 (m, 1H), 8.69 (dd, J=0.8, 7.2 Hz, 1H), 9.67 (brs, 1H), 10.22 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 17.9, 20.4, 28.7, 48.1, 94.4, 112.5, 125.9, 133.2, 138.1, 152.8, 159.5, 160.7, 190.2.

2-(Diethylamino)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carbaldehyde (142)

¹H NMR (400 MHz, CDCl₃) δ 1.25 (t, J=6.8 Hz, 6H), 2.36 (s, 3H), 3.65 (q, J=6.8 Hz, 4H), 6.72 (t, J=6.8 Hz, 1H), 7.47 (d, J=6.8 Hz, 1H), 8.65 (d, J=6.4 Hz, 1H), 10.12 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 13.2, 17.7, 45.3, 96.2, 112.2, 125.8, 133.0, 137.3, 150.2, 158.5, 162.6, 186.9.

2-(Cyclohexylmethylamino)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carbaldehyde (143)

¹H NMR (400 MHz, CDCl₃) δ 0.93-1.02 (m, 2H), 1.11-1.25 (m, 3H), 1.57-1.77 (m, 6H), 2.36 (s, 3H), 3.43 (t, J=6.0 Hz, 2H), 6.75 (t, J=7.2 Hz, 1H), 7.50 (d, J=7.2 Hz, 1H), 8.67 (d, J=6.8 Hz, 1H), 9.65 (brs, 1H), 10.21 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 17.9, 26.0, 26.5, 31.1, 38.2, 47.0, 94.4, 112.5, 125.8, 133.2, 138.0, 152.8, 159.4, 160.6, 190.2

2-Chloro-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (144)

¹H NMR (400 MHz, DMSO-d₆) δ 2.58 (s, 3H), 7.53 (t, J=7.0 Hz, 1H), 8.14 (d, J=7.2 Hz, 1H), 8.97 (d. J=6.8 Hz, 1H), 13.53 (brs, 1H); ¹³C NMR (100 MHz, DMSO-d) δ 16.7, 108.1, 117.1, 125.6, 133.3, 138.7, 148.2, 152.0, 154.6, 163.9.

2-Chloro-7-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (145)

¹H NMR (400 MHz, DMSO-d₆) δ 2.49 (s, 3H), 7.76 (d, J=8.8 Hz, 1H), 8.11 (d, J=8.8 Hz, 1H), 8.89 (s, 1H), 13.46 (br s, 1H).

2-Chloro-6-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (146)

¹H NMR (400 MHz, DMSO-d₆) δ 3.00 (s, 3H), 7.19 (d, J=7.6 Hz, 1H), 7.52 (d, J=8.0 Hz, 1H), 7.92 (t, J=8.0 Hz, 1H), 13.35 (br s, 1H).

9-Methyl-4-oxo-2-(phenylamino)-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (147)

¹H NMR (400 MHz, CDCl₃) δ 2.50 (s, 3H), 6.70 (dd, J=6.8, 7.2 Hz, 1H), 7.15 (dd, J=7.2, 7.2 Hz, 1H), 7.37 (dd, J=7.2, 7.6 Hz, 2H), 7.65 (d, J=6.8 Hz, 1H), 7.76 (d, J=8.4 Hz, 2H), 8.76 (d, J=7.2 Hz, 1H), 11.70 (brs, 1H), 14.31 (s, 1H).

2-(3-Chlorophenylamino)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (148)

¹H NMR (400 MHz, DMSO-d₆) δ 2.55 (s, 3H), 7.04 (t, J=7.0 Hz, 1H), 7.12 (d, J=8.0 Hz, 1H), 7.28 (J=8.0 Hz, 1H), 7.71 (d, J=8.0 Hz, 1H), 8.17 (s, 1H), 8.79 (d, J=7.6 Hz, 1H), 11.78 (brs, 1H).

2-(3-Chlorophenylamino)-8-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (149)

¹H NMR (400 MHz, CDCl₃) δ 2.49 (s, 3H), 6.93 (d, J=7.6 Hz, 1H), 7.12 (d, J=7.6 Hz, 1H), 7.25-7.29 (m, 2H), 7.46 (d, J=7.2 Hz, 1H), 7.96 (s, 1H), 8.76 (d, J=7.2 Hz, 1H), 11.72 (br s, 1H), 14.19 (s, 1H).

2-(3-Chlorophenylamino)-7-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (150)

¹H NMR (400 MHz, CDCl₃) δ 2.41 (s, 3H), 7.12 (d, J=8.0 Hz, 1H), 7.27 (t, J=8.6 Hz, 1H), 7.41 (d, J=8.8 Hz, 1H), 7.47 (d, J=7.6 Hz, 1H), 7.96 (s, 1H), 8.68 (s, 1H), 11.70 (br s, 1H), 14.28 (s, 1H).

2-(3-Chlorophenylamino)-6-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (151)

¹H NMR (400 MHz, CDCl₃) δ 3.03 (s, 3H), 6.70 (d, J=6.8 Hz, 1H), 7.10 (d, J=8.0 Hz, 1H), 7.23-7.27 (m, 2H), 7.44 (d, J=8.0 Hz, 1H), 7.56 (t, J=8.0 Hz, 1H), 7.91 (s, 1H), 11.76 (br s, 1H), 14.37 (s, 1H).

2-(3-Fluorophenylamino)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (152)

¹H NMR (400 MHz, CDCl₃) δ 2.54 (s, 3H), 6.81-6.87 (m, 1H), 7.03 (t, J=7.2 Hz, 1H), 7.28-7.31 (m, 2H), 7.71 (d, J=6.8 Hz, 1H), 7.89 (d, J=10.4 Hz, 1H), 8.79 (d, J=7.2 Hz 1H), 11.83 (b s, 1H), 14.26 (br s, 1H).

9-Methyl-4-oxo-2-(3-(trifluoromethyl)phenylamino)-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (153)

¹H NMR (400 MHz, CDCl₃) δ 2.54 (s, 3H), 7.05 (t, J=7.0 Hz, 1H), 7.40 (d, J=7.6 Hz, 1H), 7.47 (t, J=8.0 Hz, 1H), 7.61 (d, J=8.0 Hz, 1H), 7.73 (d, J=6.8 Hz, 1H), 8.58 (s 1H), 8.81 (d, J=6.8 Hz, 1H), 11.91 (br s, 1H).

9-Methyl-4-oxo-2-(3-(trifluoromethoxy)phenylamino)-4,1-pyrido[1,2-a]pyrimidine-3-carboxylic acid (154)

¹H NMR (400 MHz, CDCl₃) δ 2.58 (s, 3H), 7.00 (d, J=8.0 Hz, 1H), 7.05 (t, J=7.0 Hz, 1H), 7.36 (t, J=8.0 Hz, 1H), 7.42 (d, J=8.0 Hz, 1H), 7.72 (d, J=6.8 Hz, 1H), 8.09 (s, 1H), 8.81 (d, J=7.2 Hz, 1H), 11.89 (br s, 1H), 14.26 (br s, 1H).

9-Methyl-2-(3-nitrophenylamino)-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (155)

¹H NMR (400 MHz, DMSO-d₆) δ 2.60 (s, 3H), 7.40 (t, J=7.0 Hz, 1H), 7.73 (t, J=8.2 Hz, 1H), 7.96 (d, J=7.6 Hz, 1H), 8.02 (d, J=7.6 Hz, 1H), 8.13 (d, J=6.8 Hz, 1H), 8.90 (d, J=7.2 Hz, 1H), 9.33 (s, 1H), 11.84 (br s, 1H), 14.43 (br s, 1H).

2-(3-(Methoxycarbonyl)phenylamino)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (156)

¹H NMR (400 MHz, CDCl₃) δ 2.57 (s, 3H), 3.92 (s, 3H), 7.052 (t, J=6.8 Hz, 1H), 7.43 (t, J=8.0 Hz, 1H), 7.71 (t, J=7.0 Hz, 2H), 7.82 (d, J=8.0 Hz, 1H), 8.79 (d, J=6.8 Hz, 1H), 8.83 (s, 1H), 11.83 (br s, 1H), 14.28 (br s, 1H).

2-(3-Hydroxyphenylamino)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid

¹H NMR (400 MHz, CD₃OD) δ 2.55 (s, 3H), 6.61 (d, J=8.0 Hz, 1H), 7.15-7.24 (m, 3H), 7.34 (s, 1H), 7.88 (d, J=6.8 Hz, 1H), 8.82 (d, J=7.2 Hz, 1H).

2-(4-Hydroxyphenylamino)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (158)

¹H NMR (400 MHz, CD₃OD) δ 2.45 (s, 3H), 6.81 (d, J=8.8 Hz, 2H), 7.10 (t, J=7.0 Hz, 1H), 7.57 (d, J=8.8 Hz, 1H), 7.81 (d, J=6.8 Hz, 1H), 8.78 (d, J=7.2 Hz, 1H), 11.26 (br s, 1H).

2-(4-tert-Butylphenylamino)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (159)

¹H NMR (400 MHz, CDCl₃) δ 1.33 (s, 9H), 2.49 (s, 3H), 6.95 (t, J=7.0 Hz, 1H), 7.37 (d, J=7.2 Hz, 2H), 7.63 (d, J=5.6 Hz, 1H), 7.69 (d, J=6.8 Hz, 2H), 8.71 (d, J=6.8 Hz, 1H), 11.64 (br s, 1H) 14.31 (br s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 18.2, 31.3, 34.4, 85.3, 114.1, 121.3, 125.5, 125.7, 133.6, 135.4, 138.2, 147.4, 150.2, 157.0, 161.8, 169.7.

2-(3-Chlorobenzylamino)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (160)

¹H NMR (400 MHz, CDCl₃) δ 2.38 (s, 3H), 4.83 (d, J=6.0 Hz, 2H), 7.17 (t, 0.1=7.0 Hz, 1H), 7.32-7.40 (m, 3H), 7.50 (s, 1H), 7.89 (d, J=6.8 Hz, 1H), 8.68 (d, J=7.2 Hz, 1H), 9.82 (d, J=6.2 Hz, 1H), 14.25 (br s, 1H).

2-(Diethylamino)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (161)

¹H NMR (400 MHz, CDCl₃) δ 1.32 (t, J=6.8 Hz, 6H), 2.41 (s, 3H), 3.68 (q, J=6.8 Hz, 4H), 6.67 (t, J=7.2 Hz, 1H), 7.38 (d, J=6.8 Hz, 1H), 8.71 (d, J=7.2 Hz, 1H), 14.08 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 13.8, 17.8, 45.4, 96.2, 112.2, 125.8, 133.0, 137.3, 150.2, 158.5, 162.6, 171.6.

2-(Isobutylamino)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (162)

¹H NMR (400 MHz, CDCl₃) δ 0.97 (d, J=6.8 Hz, 6H), 1.93-1.99 (m, 1H), 2.40 (s, 3H), 3.43 (t, J=6.4 Hz, 2H), 6.84 (t, J=7.2 Hz, 1H), 7.53 (d, J=6.4 Hz, 1H), 8.62 (d, J=7.6 Hz, 1H), 9.52 (brs, 1H), 14.12 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 17.9, 20.4, 28.7, 48.6, 84.8, 113.2, 125.7, 133.2, 137.5, 150.5, 159.7, 162.0, 169.9.

2-(Cyclohexylmethylamino)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (163)

¹H NMR (400 MHz, CDCl₃) δ 0.98-1.05 (m, 2H), 1.13-1.24 (m, 3H), 1.60-1.79 (m, 6H), 2.42 (s, 3H), 3.45 (t, J=6.4 Hz, 2H), 6.83 (t, J=7.2 Hz, 1H), 7.54 (d, J=6.8 Hz, 1H), 8.62 (d, J=7.2 Hz, 1H), 9.57 (brs, 1H), 14.13 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 18.0, 26.0, 26.2, 31.2, 38.2, 47.4, 84.8, 113.2, 125.7, 133.2, 137.5, 150.5, 159.6, 162.0, 170.0.

2-(Cyclohexylamino)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (164)

¹H NMR (400 MHz, CDCl₃) δ 1.19-1.42 (m, 5H), 1.56-1.60 (m, 2H), 1.70-1.76 (m, 2H), 1.94-1.98 (m, 2H), 2.38 (s, 3H), 6.79 (t, J=6.8 Hz, 1H), 7.51 (d, J=6.8 Hz, 1H), 8.56 (d, J=6.8 Hz, 1H), 9.42 (d, J=6.8 Hz, 1H), 14.14 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 17.8, 24.7, 25.7, 32.6, 50.0, 84.7, 113.1, 125.6, 133.1, 137.4, 150.5, 158.5, 162.0, 169.9.

2-(Cyclopentylamino)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (165)

¹H NMR (400 MHz, CDCl₃) δ 1.54-1.67 (m, 4H), 1.73-1.78 (m, 2H), 2.04-2.10 (m, 2H), 2.42 (s, 3H), 4.51 (q, J=6.8 Hz, 1H), 6.83 (t, J=6.8 Hz, 1H), 7.53 (d, J=6.8 Hz, 1H), 8.59 (d, J=6.8 Hz, 1H), 9.47 (d, J=6.8 Hz, 1H), 14.15 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 18.0, 24.1, 33.3, 53.0, 84.8, 113.3, 125.7, 133.3, 137.5, 150.5, 158.9, 162.0, 169.9.

2-(Cycloheptylamino)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (166)

¹H NMR (400 MHz, CDCl₃) δ 1.23-1.57 (m, 4H), 1.59-1.68 (m, 4H), 1.69-1.74 (m, 2H), 1.98-2.04 (m, 2H), 2.43 (s, 3H), 4.30-4.36 (m, 1H), 6.83 (t, J=6.8 Hz, 1H), 7.53 (d, J=6.8 Hz, 1H), 8.64 (d, J=6.8 Hz, 1H), 9.53 (d, J=6.8 Hz, 1H), 14.19 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 18.0, 24.6, 28.1, 34.7, 52.3, 84.8, 113.1, 125.8, 133.2, 137.4, 150.4, 158.3, 162.1, 170.0.

2-(1-(tert-Butoxycarbonyl)piperidin-4-ylamino)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (167)

¹H NMR (400 MHz, CDCl₃) δ 1.51 (s, 9H), 1.61-1.65 (m, 2H), 2.01-2.03 (m, 2H), 2.42 (s, 3H), 2.99-3.05 (m, 2H), 3.98-4.00 (m, 2H), 4.26-4.33 (m, 1H), 6.88 (t, J=7.2 Hz, 1H), 7.58 (d, J=6.8 Hz, 1H), 8.67 (d, J=7.2 Hz, 1H), 9.56 (d, J=6.8 Hz), 14.12 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 17.9, 28.6, 31.6, 48.5, 66.4, 79.9, 85.0, 113.5, 125.9, 133.2, 137.8, 150.6, 154.9, 158.9, 162.0, 169.9.

2-(2-(4-Fluorophenoxy)ethylamino)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (168)

¹H NMR (400 MHz, CDCl₃) δ 2.44 (s, 3H), 4.01 (t, J=5.6 Hz, 2H), 4.15 (t, J=5.6 Hz, 2H), 6.83-6.96 (m, 5H), 7.59 (d, J=6.8 Hz, 1H), 8.68 (d, J=7.2 Hz, 1H), 9.81 (brs, 1H), 14.01 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 18.0, 40.5, 67.1, 85.3, 113.6, 115.8, 115.9, 116.0, 116.1, 125.9, 133.2, 137.9, 150.6, 154.8, 159.8, 161.9, 169.7.

9-Methyl-4-oxo-2-(2-(4-(trifluoromethoxy)phenoxy)ethylamino)-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (169)

¹H NMR (400 MHz, CDCl₃) δ 2.44 (s, 3H), 4.03 (t, J=5.6 Hz, 2H), 4.18 (t, J=5.6 Hz, 2H), 6.90 (d, J=9.2 Hz, 2H), 6.91 (t, J=6.8 Hz, 1H), 7.11 (d, J=9.2 Hz, 2H), 7.60 (d, J=6.8 Hz, 1H), 9.70 (d, J=7.2 Hz, 1H), 9.82 (brs, 1H), 14.08 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 18.0, 40.5, 66.9, 77.4, 85.4, 113.7, 115.7, 122.6, 126.0, 133.2, 138.0, 155.8, 157.6, 159.9, 162.0, 169.0, 170.4.

9-Methyl-2-morpholino-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (170)

¹H NMR (400 MHz, CDCl₃) δ 2.42 (s, 3H), 3.65 (t, J=4.8 Hz, 4H), 3.74 (t, J=4.8 Hz, 4H), 6.86 (t, J=6.8 Hz, 1H), 7.51 (d, J=6.8 Hz, 1H), 8.67 (d, J=6.8 Hz, 1H), 13.98 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 18.1, 58.4, 64.8, 97.5, 113.6, 124.6, 132.6, 136.0, 148.1, 160.5, 161.7, 171.3.

2-(3,4-Dihydroisoquinolin-2(1H)-yl)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (171)

¹H NMR (400 MHz, CDCl₃) δ 2.45 (s, 3H), 3.03 (t, J=5.8 Hz, 2H), 4.08 (m, 2H), 4.73 (m, 2H), 6.83 (t, J=7.0 Hz, 1H), 7.06-7.18 (m, 4H), 7.52 (d, J=6.8 Hz, 1H), 8.60 (d, J=7.2 Hz, 1H), 13.73 (br s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 17.6, 28.5, 46.1, 52.4, 86.4, 113.0, 125.5, 126.1, 126.2, 126.6, 128.4, 132.9, 133.7, 134.4, 136.8, 148.1, 159.9, 163.2, 165.3.

2-(4-(2-Chlorophenyl)piperazin-1-yl)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (172)

¹H NMR (400 MHz, CDCl₃) δ 2.44 (s, 3H), 3.19 (t, J=4.8 Hz, 4H), 3.96 (m, 4H), 6.87 (t, J=7.0 Hz, 1H), 6.98 (t, J=7.6 Hz, 1H), 7.02 (d, J=8.4 Hz, 1H), 7.20 (t, J=7.8 Hz, 1H), 7.36 (d, J=8.0 Hz, 1H), 7.55 (d, J=6.8 Hz, 1H), 8.66 (d, J=7.2 Hz, 1H), 13.74 (br s, 1H).

2-(3-Chlorophenylamino)-8-(4-methylpiperazin-1-yl)-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (173)

¹H NMR (400 MHz, CDCl₃) δ2.34 (s, 3H), 2.53 (t, J=4.8 Hz, 4H), 3.54 (t, J=4.8 Hz, 4H), 6.34 (d, J=2.8 Hz, 1H), 6.55 (dd, J=2.8, 8.4 Hz, 1H), 7.04 (d, J=7.2 Hz, 1H), 7.22 (t, J=8.0 Hz, 1H), 7.49 (dd, J=1.6, 8.0 Hz, 1H), 7.86 (t, J=2.0 Hz, 1H), 8.53 (d, J=8.4 Hz, 1H), 11.5 (s, 1H), 14.18 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 46.1, 46.4, 54.4, 83.6, 98.8, 105.1, 120.0, 121.9, 124.0, 128.8, 129.9, 134.4, 139.9, 151.4, 155.6, 158.2, 161.8, 170.2.

General Procedure for the Synthesis of H2

2-Amino-3-picoline (1.0 mmol) was dissolved in diethyl ethoxymethylenemalonate (1.0 mmol). The solution was heated to 170° C. for 12 h. After cooling, the dark residue was triturated with EtOAc (10 mL). The residual pale solid was collected by filtration and washed with EtOAc to give II.

General Procedure for the Synthesis of H2

To a stirred solution of H1 (0.43 mmol) in H₂O (3.0 mL) and EtOH (1.0 mL) was added LiOH (0.86 mmol). The mixture was stirred at room temperature for 3 h. The reaction mixture was diluted with CH₂Cl₂ (10 mL) and washed with 1 N HCl (10 ml). The organic layer was dried over anhydrous MgSO₄ and concentrated in vacuo. The crude product was purified by flash column chromatography to give H2.

General Procedure for the Synthesis of H3

To a stirred solution of H1 (0.38 mmol) in THF (2.0 mL) was added LiAlH₄ (0.57 mmol) at 0° C. The reaction mixture was stirred at 0° C. for 3 h. After reaction was completed, 1N NaOH (2 mL) was added dropwise. The mixture was diluted with CH₂Cl₂ (10 mL) and washed with H₂O (10 ml). The organic layer was dried over anhydrous MgSO₄ and concentrated in vacuo. The crude product was purified by flash column chromatography to give H3.

General Procedure for the Synthesis of H4

To a stirred solution of H3 (95 μmol) in CH₂Cl₂ (1.0 mL) was added NaHCO₃ (285 μmol) and Dess-Martin Periodinane (114 μmol) at 0° C. The mixture was stirred at 0° C. for 1 h. The reaction mixture was filtered off and concentrated in vacuo. The crude product was purified by flash column chromatography to give H4.

General Procedure for the Synthesis of H5

To a stirred solution of 2-Amino-pyridine (10.6 mmol) in xylene (10.0 mL) was added diethyl ethoxymethylenemalonate (21.2 mmol). The mixture was stirred at 140 for 3 hr. After reaction was completed, the residual pale solid was collected by filtration and washed with diethyl ether to give H5.

General Procedure for the Synthesis of H6

To a stirred solution of H5 (0.42 mmol) in THF (5.0 mL) was added triethylamine (0.63 mmol) and p-toluenesulfonylchloride (0.46 mmol) at 0° C. The reaction mixture was stirred at room temperature for overnight. After reaction was completed, the mixture was diluted with CH₂Cl₂ (40 mL) and washed with 1N HCl (50 ml), saturated NaHCO₃ (50 ml) and brine (50 ml). The organic layer was dried over anhydrous MgSO₄ and concentrated in vacuo. The crude product was purified by flash column chromatography to give H6.

General Procedure for the Synthesis of 117

To a stirred solution of H6 (0.25 mmol) in THF (1.2 mL) was added triethylamine (0.5 mmol) and an amine (0.26 mmol) at 0° C. The reaction mixture was stirred at room temperature for overnight. After reaction was completed, the mixture was diluted with CH₂Cl₂ (10 mL) and washed with 1N HCl (10 ml), saturated NaHCO₃ (10 ml) and brine (10 ml). The organic layer was dried over anhydrous MgSO₄ and concentrated in vacuo. The crude product was purified by flash column chromatography to give 117.

General Procedure for the Synthesis of H8

To a stirred solution of H7 (0.27 mmol) in ethylene glycol (3.0 mL) was added methylamine (2 N solution in THF 1.3 mL). The mixture was stirred at 150° C. for 3 hr. The reaction mixture was added with ethylacetate (10 mL) and the residual pale solid was collected by filtration and washed with EtOAc. The crude product was purified by flash column chromatography to give H8.

General Procedure for the Synthesis of H9

To a stirred solution of H5 (2.13 mmol) in MeOH (8.0 mL) was added Pd/C (113 mg). The mixture was stirred at room temperature under H₂ for 3 h. After reaction was completed, the reaction mixture was filtered off and concentrated in vacuo. The crude product was recrystallized with EtOAc and hexane (1:4) to give H9.

General Procedure for the Synthesis of H10

To a stirred solution of H9 (0.42 mmol) in CH₂Cl₂ (5.0 mL) was added triethylamine (0.63 mmol) and p-toluenesulfonylchloride (0.46 mmol) at 0° C. The reaction mixture was stirred at room temperature for overnight. After reaction was completed, the mixture was diluted with CH₂Cl₂ (40 mL) and washed with 1N HCl (50 ml), saturated NaHCO₃ (50 ml) and brine (50 ml). The organic layer was dried over anhydrous MgSO₄ and concentrated in vacuo. The crude product was purified by flash column chromatography (Hexane:EtOAc=1:2) to give H10.

General Procedure for the Synthesis of H11

To a stirred solution of H10 (0.25 mmol) in THF (2.0 mL) was added triethylamine (0.5 mmol) and an amine (0.37 mmol) at 0° C. The reaction mixture was stirred at room temperature for overnight. After reaction was completed, the mixture was diluted with CH₂Cl₂ (10 mL) and washed with 1N HCl (10 ml), saturated NaHCO₃ (10 ml) and brine (10 ml). The organic layer was dried over anhydrous MgSO₄ and concentrated in vacuo. The crude product was purified by flash column chromatography (Hexane:EtOAc=1:1) to give H11.

General Procedure for the Synthesis of H12

A solution of G3 (1.0 mmol), an amine (1.1 mmol) and triethylamine (2.0 mmol) in THF (2 mL) was refluxed for 1 h and cooled to room temperature. The solvent was evaporated to dryness, which was extracted with CH₂Cl₂ (20 mL×3). The reaction mixture was washed with 5% sodium bicarbonate. The organic layer was dried (MgSO₄), filtered, and concentrated in vacuo. The crude product was purified by flash column chromatography to give H12.

General Procedure for the Synthesis of H13

To a solution of G3 (1.1 mmol), an amine (1.0 mmol) in CH₂Cl₂ (5 mL) were added sodium triacetoxyborohydride (2.0 mmol) and glacial acetic acid (2.0 mmol) at room temperature for 20 h. The reaction mixture was added saturated ammonium chloride solution and stirred for 10 min. The reaction mixture was extracted with CH₂Cl₂ (20 mL). The organic layer was dried (MgSO₄), filtered, and concentrated in vacuo. The crude product was purified by flash column chromatography to give H13.

Ethyl 9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylate (174)

¹H NMR (400 MHz, CDCl₃) δ 1.39 (t, J=7.2 Hz, 3H), 2.62 (s, 3H), 4.39 (q, J=7.2 Hz, 2H), 7.20 (t, J=7.2 Hz, 1H), 7.77 (d, J=7.2 Hz, 1H), 9.05 (s, 1H), 9.16 (d, J=7.2 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) 14.6, 18.2, 61.2, 105.3, 116.8, 127.0, 135.9, 138.2, 155.3, 158.4, 165.0, 189.1.

9-Methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (175)

¹H NMR (400 MHz, CDCl₃) δ 2.56 (s, 3H), 7.12 (t, J=6.8 Hz, 1H), 7.79 (d, J=6.8 Hz, 1H), 8.87 (s, 1H), 9.21 (d, J=7.2 Hz), 14.13 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ18.3, 110.9, 117.1, 128.1, 137.6, 141.1, 155.0, 157.1, 158.3, 171.3.

3-(Hydroxymethyl)-9-methyl-4H-pyrido[1,2-a]pyrimidin-4-one (176)

¹H NMR (400 MHz, CDCl₃) δ 2.51 (s, 3H), 3.27 (brs, 1H), 4.66 (s, 2H), 7.01 (t, J=6.8 Hz, 1H), 7.51 (d, J=6.8 Hz, 1H), 8.32 (s, 1H), 8.87 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) 18.2, 44.1, 111.2, 117.9, 127.1, 135.7, 139.8, 153.9, 155.6, 158.2.

9-Methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carbaldehyde (177)

¹H NMR (400 MHz, CDCl₃) δ 2.63 (s, 3H), 7.29 (t, J=7.2 Hz, 1H), 7.86 (d, J=7.2 Hz, 1H), 8.85 (s, 1H), 9.14 (d, J=7.2 Hz, 1H), 10.33 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 18.2, 110.9, 117.5, 126.7, 136.5, 139.5, 153.1, 155.6, 158.1, 188.5.

Ethyl 2-hydroxy-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylate (178)

¹H NMR (400 MHz, CDCl₃) δ 1.42 (t, J=7.2 Hz 3H), 4.45 (q, J=7.2 Hz, 2H), 7.13 (ddd, J=1.2, 6.8, 7.2 Hz, 1H), 7.49 (d, J=8.8 Hz, 1H), 7.82-7.86 (m, 1H), 9.00 (d, J=7.2 Hz, 1H), 13.64 (brs, 1H, NH); ¹³C NMR (100 MHz, CDCl₃) δ 14.2, 62.3, 87.1, 115.3, 125.1, 128.7, 140.3, 148.4, 152.6, 155.5, 171.7.

2-Hydroxy-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylic acid (179)

¹H NMR (400 MHz, CDCl₃) δ 2.50 (s, 3H), 6.70 (dd, J=6.8, 7.2 Hz, 1H), 7.15 (dd, J=7.2, 7.2 Hz, 1H), 7.37, (dd, J=7.2, 7.6 Hz, 1H), 7.65 (d, J=6.8 Hz, 1H), 7.76 (d, J=8.4 Hz, 1H), 8.76 (d, J=7.2 Hz, 1H), 11.70 (brs, 1H), 14.31 (s, 1H).

Ethyl 4-oxo-2-(phenylamino)-4H-pyrido[1,2-a]pyrimidine-3-carboxylate (180)

¹H NMR (400 MHz, CDCl₃) δ 1.45 (t, J=7.2 Hz, 3H), 4.44 (q, J=7.2 Hz, 2H), 6.93 (dd, J=6.8, 6.8 Hz, 1H), 7.29-7.36 (m, 3H), 7.65-7.68 (m, 3H), 8.97 (d, J=7.2 Hz, 1H), 11.39 (brs, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 14.4, 61.0, 85.5, 113.6, 122.5, 124.2, 124.5, 128.4, 128.6, 138.4, 139.0, 151.6, 155.9, 159.5, 169.6.

Ethyl 2-(3-hydroxyphenylamino)-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylate (181)

¹H NMR (400 MHz, CDCl₃+CD₃OD) δ 1.38 (t, J=7.0 Hz, 3H), 4.37 (q, J=7.2 Hz, 2H), 6.56-6.58 (m, 1H), 6.92 (dd, J=6.8, 7.2 Hz, 1H0, 7.05 (d, J=8.4 Hz, 1h0, 7.12 (dd, J=8.0, 8.0 Hz, 1H), 7.26 (m, 1H), 7.31 (d, J=8.8 Hz, 1H), 7.66 (dd, J=7.2, 7.6 Hz, 1H), 8.90 (d, J=7.2 Hz, 1H), 11.22 (brs, 1H).

Ethyl 2-(2-hydroxyphenylamino)-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylate (182)

¹H NMR (400 MHz, CDCl₃) δ 1.45 (t, J=7.2 Hz, 3H), 4.45 (q, J=6.8 Hz, 2H), 6.90 (dd, J=7.2, 8.0 Hz, 1H), 7.05-7.08 (m, 2H), 7.13 (dd, J=7.6, 8.4 Hz, 2H), 7.37 (d, J=8.4 Hz, 1H), 7.81 (dd, J=7.6, 8.0 Hz, 1H), 9.03 (d, J=6.8 Hz, 1H), 11.52 (brs, 1H); ¹³C NMR (100 MHz, CDCl₃) 14.4, 61.3, 114.7, 120.1, 120.5, 122.9, 124.4, 127.0, 127.1, 129.0, 140.8, 149.3, 151.1, 158.6, 169.5.

Ethyl 2-(3-nitrophenylamino)-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylate (183)

¹H NMR (400 MHz, CDCl₃) δ 1.46 (t, J=6.4 Hz, 3H), 4.45 (q, J=7.2 Hz, 2H), 7.05 (ddd, J=1.2, 6.8, 6.8 Hz, 1H), 7.43 (d, J=8.8 Hz, 1H), 7.47 (dd, J=8.0, 8.4 Hz, 2H), 7.77-7.82 (m, 2H), 7.93-7.96 (m, 1H), 8.97-8.98 (m, 1H), 9.04 (dd, J=0.8, 7.2 Hz, 1H), 11.74 (brs, 1H); ¹³C NMR (100 MHz, CDCl₃) 14.4, 61.3, 86.1, 114.5, 116.9, 118.4, 124.7, 127.4, 128.6, 129.2, 139.8, 148.5, 151.5, 155.7, 159.5, 169.6.

Ethyl 4-oxo-2-phenoxy-4H-pyrido[1,2-a]pyrimidine-3-carboxylate (184)

¹H NMR (400 MHz, CDCl₃) δ 1.38 (t, J=7.2 Hz, 3H), 4.42 (q, J=7.2 Hz, 2H), 7.15-7.17 (m, 3H), 7.24 (d, J=6.4 Hz, 1H), 7.36-7.41 (m, 3H), 7.77 (ddd, J=1.6, 6.8, 6.8 Hz, 1H), 9.10 (dd, J=0.8, 6.8 Hz, 1H); ); ¹³C NMR (100 MHz, CDCl₃) δ 14.2, 61.3, 115.7, 121.8, 125.3, 128.5, 129.2, 128.7, 150.3, 152.5, 156.7, 164.1, 165.0.

Ethyl 2-(3-fluorophenoxy)-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylate (185)

¹H NMR (400 MHz, CDCl₃) δ 1.37 (t, J=7.0 Hz, 3H), 4.40 (q, J=6.8 Hz, 2H), 6.91-6.98 m, 3H), 7.19 (ddd, J=1.2, 7.2, 7.2 Hz, 1H), 7.32-7.36 (m, 1H), 7.39 (d, J=8.8 Hz, 1H), 7.78-7.82 (m, 1H), 9.10 (d, J=6.8 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 14.2, 61.4, 94.6, 109.8, 110.0, 112.2, 112.4, 115.9, 117.5, 117.6, 125.3, 128.5, 129.8, 129.9, 139.9, 150.3, 153.3, 156.6, 161.6, 163.8, 164.0, 164.5.

Ethyl 4-oxo-2-(3-(trifluoromethyl)phenoxy)-4H-pyrido[1,2-a]pyrimidine-3-carboxylate (186)

¹H NMR (400 MHz, CDCl₃) δ 1.39 (t, J=7.2 Hz, 3H), 4.43 (q, J=7.0 Hz 2H), 7.21 (dd, J=6.8, 6.8 Hz, 1H), 7.38 (d, J=8.0 Hz, 2H), 7.47-7.52 (m, 2H), 7.81 (dd, J=7.2, 8.4 Hz, 1H), 9.12 (d, J=6.8 Hz, 1H).

Methyl 2-chloro-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylate (187)

¹H NMR (400 MHz, CDCl₃) δ 2.56 (s, 3H), 3.93 (s, 3H), 7.19 (t, J=7.2 Hz, 1H), 7.75 (d, J=6.8 Hz, 1H), 8.91 (d, J=7.2 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 17.1, 52.8, 108.0, 116.7, 126.1, 134.9, 138:3, 149.1, 155.1, 155.2, 164.2.

Methyl 2-(3-chlorophenylamino)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylate

¹H NMR (400 MHz, CDCl₃) δ 2.51 (s, 3H), 3.99 (s, 3H), 6.94 (t, J=7.0 Hz, 1H), 7.09 (d, J=7.6 Hz, 1H), 7.27 (d, J=8.4 Hz, 1H), 7.41 (d, J=8.0 Hz, 1H), 7.64 (d, J=6.8 Hz, 1H), 8.18 (s, 1H), 8.91 (d, J=7.2 Hz, 1H), 11.52 (br s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 18.0, 52.1, 85.3, 113.7, 119.6, 121.9, 123.5, 126.4, 129.4, 133.2, 134.1, 138.4, 139.9, 151.0, 156.2, 158.6, 170.1.

Methyl 2-(3-chlorobenzylamino)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxylate (189)

¹H NMR (400 MHz, CDCl₃) δ 2.35 (s, 3H), 3.92 (s, 3H), 4.77 (d, J=6.0 Hz, 2H), 6.80 (t, J=6.8 Hz, 1H), 7.20-7.24 (m, 3H), 7.34 (s, 3H), 7.50 (d, J=6.8 Hz, 1H), 8.82 (d, J=7.2 Hz, 1H), 9.69 (br s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 17.8, 44.4, 51.8, 84.6, 112.6, 125.5, 126.4, 127.2, 127.7, 129.7, 132.7, 134.3, 137.6, 141.1, 151.3, 156.4, 160.8, 170.1.

Ethyl 2-hydroxy-4-oxo-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidine-3-carboxylate (190)

¹H NMR (400 MHz, CDCl₃) δ 1.36 (t, J=7.2 Hz, 3H), 1.82-1.93 (m, 4H), 2.86 (t, J=6.8 Hz, 2H), 3.84 (t, J=6.0 Hz, 2H), 4.39 (q, J=7.2 Hz, 2H); ¹³C NMR (100 MHz, CDCl₃) δ 14.4, 18.9, 21.9, 32.2, 43.0, 62.4, 90.9, 159.8, 165.1, 171.7, 173.5.

Ethyl 4-oxo-2-(tosyloxy)-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidine-3-carboxylate (191)

¹H NMR (400 MHz, CDCl₃) δ 1.25 (t, J=7.2 Hz, 3H), 1.79-1.91 (m, 4H), 2.41 (s, 3H), 2.79 (t, J=6.4 Hz, 2H), 3.84 (t, J=6.4 Hz, 2H), 4.25 (q, J=7.2 Hz, 2H), 7.31 (d, J=8.0 Hz, 2H), 7.89 (d, J=8.0 Hz, 2H); ¹³C NMR (100 MHz, CDCl₃) δ 14.2, 18.8, 21.6, 21.9, 31.8, 43.6, 61.9, 104.2, 129.1, 129.7, 134.2, 145.8, 159.4, 160.8, 162.0, 162.2.

Ethyl 4-oxo-2-(phenylamino)-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidine-3-carboxylate (192)

¹H NMR (400 MHz, CDCl₃) δ 1.40 (t, J=7.2 Hz, 3H), 1.80-1.92 (m, 4H), 2.80 (t, J=6.8 Hz, 2H), 3.87 (t, J=6.0 Hz, 2H), 4.36 (q, J=7.2 Hz, 2H), 7.08 (t, J=7.2 Hz, 1H), 7.29 (t, J=7.2 Hz, 2H), 7.53 (d, J=7.6 Hz, 2H), 11.2 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 14.6, 19.2, 22.2, 32.2, 42.4, 61.0, 88.4, 122.9, 124.4, 128.8, 138.4, 160.5, 160.8, 162.2, 169.8.

Ethyl 2-(3-chlorophenylamino)-4-oxo-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidine-3-carboxylate (193)

¹H NMR (400 MHz, CDCl₃) δ 1.32 (t, J=7.2 Hz, 3H), 1.76-1.88 (m, 4H), 2.76 (t, J=6.8 Hz, 2H), 3.78 (t, J=6.0 Hz, 2H), 4.29 (q, J=7.06 (dd, J=7.2 Hz, 2H), J=1.2, 8.0 Hz, 1H), 7.27 (t, J=8.0 Hz, 1H), 7.51 (dd, J=1.2, 8.0 Hz, 1H), 7.58 (d, J=2.0 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 14.3, 18.6, 22.1, 32.1, 42.6, 61.1, 81.4, 111.2, 111.7, 113.0, 128.4, 140.4, 149.6, 158.7, 161.12, 163.2, 170.4.

Ethyl 4-oxo-2-(3-(trifluoromethyl)phenylamino)-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidine-3-carboxylate (194)

¹H NMR (400 MHz, CDCl₃) δ 1.45 (t, J=7.2 Hz, 3H), 1.88-1.97 (m, 4H), 2.87 (t, J=6.4 Hz, 2H), 3.93 (t, J=5.6 Hz, 2H), 4.41 (q, J=7.2 Hz, 2H), 7.35 (t, J=7.2 Hz, 1H), 7.35 (d, J=7.6 Hz, 1H), 7.67 (d, J=7.6 Hz, 1H), 8.05 (s, 1H), 11.2 (s, 1H);

Ethyl 2-(2-hydroxyphenylamino)-4-oxo-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidine-3-carboxylate 195)

¹H NMR (400 MHz, CDCl₃) δ 1.40 (t, J=7.2 Hz, 3H), 1.81-1.94 (m, 4H), 2.65 (t, J=6.8 Hz, 2H), 3.65 (t, J=6.0 Hz, 2H), 4.18 (q, J=6.8 Hz, 2H), 6.85 (t, J=7.2 Hz, 1H), 7.00 (d, J=7.2 Hz, 1H), 7.06-7.12 (m, 2H), 9.98 (s, 1H), 11.3 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 14.6, 18.8, 21.9, 31.6, 42.6, 61.3, 88.4, 120.2, 120.7, 124.5, 127.1, 127.2, 149.1, 159.4, 159.5, 163.0, 169.6.

Ethyl 2-(3-hydroxyphenylamino)-4-oxo-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidine-3-carboxylate (196)

¹H NMR (400 MHz, CDCl₃+MeOD-d₄) δ 1.26 (t, J=7.2 Hz, 3H), 1.71-1.81 (m, 4H), 2.72 (t, J=6.4 Hz, 2H), 3.74 (t, J=6.4 Hz, 2H), 4.23 (q, J=7.2 Hz, 2H), 6.47 (d, J=7.6 Hz, 1H), 6.88 (d, J=8.0 Hz, 1H), 6.99 (d, J=8.0 Hz, 1H), 7.02 (t, J=2.0 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃+MeOD-d₄) δ 14.2, 18.8, 21.9, 31.8, 42.4, 60.9, 79.8, 109.8, 111.6, 114.0, 129.4, 139.4, 149.7, 159.3, 160.2, 163.1, 169.6.

Ethyl 2-(4-hydroxyphenylamino)-4-oxo-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidine-3-carboxylate (197)

¹H NMR (400 MHz, DMSO-d₆) δ 1.21 (t, J=7.2 Hz, 3H), 1.67-1.80 (m, 4H), 2.65 (t, J=6.8 Hz, 2H), 3.65 (t, J=6.0 Hz, 2H), 4.18 (q, J=7.2 Hz, 2H), 6.68 (d, J=8.8 Hz, 2H), 7.25 (d, J=8.8 Hz, 2H), 9.29 (s, 1H), 10.7 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 14.9, 18.9, 21.9, 32.1, 42.3, 60.4, 87.2, 115.7, 125.0, 130.1, 154.9, 159.4, 160.6, 163.3, 169.6.

2-(3-Chloro-4-fluorophenylamino)-9-methyl-4-oxo-4H-pyrido[1,2-a]pyrimidine-3-carboxamide (198)

mp=218° C. (decomp.); ¹H NMR (400 MHz, CDCl₃) δ 2.97 (d, J=4.8 Hz, 3H), 4.41 (s, 3H), 6.89 (dd, J=7.2 Hz, 7.2 Hz, 1H), 6.97 (dd, J=1.2 Hz, 8.0 Hz, 1H), 7.05 (dd, J=8.8 Hz, 8.8 Hz, 1H), 7.40-7.44 (m, 1H), 8.46-8.51 (m, 2H), 8.82 (d, J=2.0 Hz, 1H), 12.98 (s, 1H);

(E)-2-(3-Chlorophenylamino)-3-((cyclohexylimino)methyl)-4H-pyrido[1,2-a]pyrimidin-4-one (199)

¹H NMR (400 MHz, CDCl₃) δ 1.23-1.37 (m, 3H), 1.41-1.50 (m, 2H), 1.56-1.59 (m, 1H), 1.73-1.76 (m, 4H), 3.16-3.22 (m, 1H), 6.85 (ddd, J=1.2, 6.8, 6.8 Hz, 1H), 6.94 (ddd, J=0.8, 1.2, 8.0 Hz, 1H), 7.14 (dd, J=8.0, 8.0 Hz, 1H), 7.38 (ddd, J=0.8, 1.2, 8.0 Hz, 1H), 7.54-7.58 (m, 1H), 7.90-7.91 (m, 1H), 8.83 (s, 1H), 8.85 (dd, J=0.8, 1.2 Hz, 1H), 13.40 (brs, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 24.4, 25.6, 34.9, 68.4, 91.6, 113.4, 119.2, 121.2, 123.0, 124.7, 127.6, 129.5, 134.2, 137.6, 140.8, 150.6, 156.3, 157.0, 158.3.

(E)-2-(3-Chlorophenylamino)-3-((3-chlorophenylimino)methyl)-4H-pyrido[1,2-a]pyrimidin-4-one (200)

¹H NMR (400 MHz, CDCl₃) δ 7.01 (dd, J=0.8, 1.2, 8.0 Hz, 1H), 7.28 (d, J=8.4 Hz, 1H), 7.29 (dd, J=2.0, 4.0 Hz, 1H), 7.33 (d, J=8.0 Hz, 1H), 7.44 (d, J=8.8 Hz, 1H), 7.52 (ddd, J=0.8, 1.2, 8.0 Hz, 1H), 7.17-7.76 (m, 1H), 8.02-8.04 (m, II), 8.98 (dd, J=0.8, 6.8 Hz, 1H), 9.17 (s, 1H), 12.94 (brs, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 92.6, 114.0, 119.5, 119.8, 121.8, 123.9, 125.0, 125.7, 128.0, 129.7, 130.2, 134.4, 134.8, 138.7, 140.1, 151.3, 151.8, 157.0, 158.0, 158.9.

2-(3-Chlorophenylamino)-3-((cyclopentylamino)methyl)-4H-pyrido[1,2-a]pyrimidin-4-one (201)

¹H NMR (400 MHz, CDCl₃) δ 1.54-1.57 (m, 2H), 1.74-1.83 (m, 4H), 2.05-2.08 (m, 2H), 3.23-3.24 (m, 1H), 4.19 (s, 2H), 6.93-6.98 (m, 2H), 7.11-7.15 (m, 1H), 7.32 (d, J=8.4 Hz, 1H), 7.51 (dd, J=2.0, 8.4 Hz, 1H), 7.61-7.65 (m, 1H), 7.74-7.75 (m, 1H), 8.73 (d, J=7.2 Hz, 1H).

2-(3-Chloroophenylamino)-3-((cyclohexylamino)methyl)-4H-pyrido[1,2-a]pyrimidin-4-one (202)

¹H NMR (400 MHz, CDCl₃) δ 1.20-1.35 (m, 4H), 1.66-1.72 (m, 2H), 1.86-1.89 (m, 2H), 2.23-2.39 (m, 2H), 3.12-3.18 (m, 1H), 6.93 (ddd, J=1.2, 6.8, 7.2 Hz, 1H), 6.99 (ddd, J=0.8, 1.2, 7.6 Hz, 1H), 7.20 (dd, J=8.0, 8.0 Hz, 1H), 7.25 (d, J=8.8 Hz, 1H), 7.52-7.57 (m, 1H), 7.61 (dd, J=1.2, 8.0 Hz, 1H), 7.84-7.85 (m, 1H), 8.76 (d, J=6.4 Hz, 1H), 9.77 (brs, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 24.6, 25.0, 41.2, 57.9, 88.9, 114.6, 119.2, 121.1, 122.8, 124.6, 127.3, 129.4, 133.7, 137.3, 140.8, 149.6, 157.2, 158.8.

2-(3-Chlorophenylamino)-3-((cycloheptylamino)methyl)-4H-pyrido[1,2-a]pyrimidin-4-one (203)

¹H NMR (400 MHz, CDCl₃) δ 1.40-1.59 (m, 6H), 1.72-1.81 (m, 4H), 2.18-2.23 (m, 2H), 3.07-3.12 (m, 1H), 4.05 (m, 2H), 6.82 (ddd, J=1.2, 6.8, 6.8 Hz, 1H), 6.91 (dd, J=1.2, 8.0 Hz, 1H), 7.14 (dd, J=8.0, 8.0 Hz, 1H), 7.44-7.49 (m, 2H), 7.78-7.80 (m, 1H), 8.70 (d, J=6.8 Hz, 1H), 10.00 (brs, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 23.8, 32.3, 41.5, 59.7, 89.7, 114.2, 118.7, 120.6, 122.4, 124.4, 127.2, 129.3, 133.7, 136.8, 140.9, 149.4, 157.2, 158.2.

2-(3-Chlorophenylamino)-3-((isopropylamino)methyl)-4H-pyrido[1,2-a]pyrimidin-4-one (204)

¹H NMR (400 MHz, CDCl₃) δ 1.25 (s, 3H), 1.26 (s, 3H), 2.30-3.06 (m, 1H), 4.05 (s, 2H), 6.87 (dd, J=6.4, 7.2 Hz, 1H), 6.95 (d, J=7.2 Hz, 1H), 7.17 (dd, J=8.0, 8.0 Hz, 1H), 7.32 (d, J=8.8 Hz, 1H), 7.41 (d, J=8.0 Hz, 1H), 7.54 (dd, J=7.2, 7.2 Hz, 1H), 7.81 (s, 1H), 8.83 (d, J=6.8 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 22.1, 41.7, 48.9, 91.5, 113.7, 118.2, 120.1, 122.2, 124.6, 127.5, 129.5, 134.1, 136.2, 141.2, 149.5, 157.4, 157.8.

2-(3-Chlorophenylamino)-3-((cyclohexylamino)methyl)-8-(4-methylpiperazin-1-yl)-4H-pyrido[1,2-a]pyrimidin-4-one (205)

¹H NMR (400 MHz, CDCl₃) δ 1.20-1.34 (m, 3H), 1.71-1.91 (m, 3H), 1.92-2.04 (m, 2H), 2.20 (s, 3H), 2.23-2.36 (m, 6H), 3.04-3.10 (m, 5H), 4.01 (s, 2H), 5.87 (s, 1H), 6.55 (s, J=8.0 hz, 1H), 6.90 (d, J=8.0 Hz, 1H), 7.14 (t, J=8.0 Hz, 1H), 7.62 (d, J=7.6 Hz, 1H), 7.84 (s, 1H), 8.46 (d, J=7.6 Hz, 1H), 9.59 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 24.9, 25.3, 30.2, 41.2, 46.1, 46.3, 54.2, 58.4, 86.2, 98.9, 106.5, 119.3, 121.0, 122.3, 128.3, 129.5, 133.9, 141.9, 150.8, 154.8, 157.7, 158.9.

General Procedure for the Synthesis of J1

To a solution of an aldehyde (0.9 mmol) in methanol (0.5 mL) was added NaBH₄ (1.35 mmol) at room temperature. After stirring 1 h, the reaction mixture was diluted with methylene chloride (10 mL) and washed with brine (10 ml). The organic layer was dried over MgSO₄ and concentrated in vacuo. The crude product was purified by recrystallization from a mixture of hexanes and ethyl acetate to give J1.

General Procedure for the Synthesis of J2

To a stirred solution of an ester (0.06 mmol) in THF (1.0 mL) was added LiAlH₄ (0.09 mmol). The reaction mixture was stirred at room temperature for 1 hr. After reaction was completed, H₂O (0.1 mL) was added dropwise. The reaction mixture was filtered off and concentrated in vacuo. The crude product was purified by flash column chromatography to give J2.

General Procedure for the Synthesis of J3

To a stirred solution of J1 or J2 (0.19 mmol) in CH₂Cl₂ (0.6 mL) was added triethylamine (0.38 mmol) and a benzoyl chloride (0.28 mmol) at 0° C. The reaction mixture was stirred at room temperature for 1 h. After reaction was completed, the mixture was diluted with CH₂Cl₂ (10 mL) and washed with brine (10 ml). The organic layer was dried over anhydrous MgSO₄ and concentrated in vacuo. The crude product was purified by flash column chromatography (Hexane:EtOAc=2:1) to give J3.

3-(Hydroxymethyl)-2-(phenylamino)-4H-pyrido[1,2-a]pyrimidin-4-one (206)

¹H NMR (400 MHz, CDCl₃+CD₃OD) δ 4.80 (s, 2H), 6.87-6.90 (m, 1H), 8.03 (dd, J=7.2, 7.6 Hz, 1H), 7.27 (dd, J=7.6, 8.0 Hz, 2H), 7.53-7.58 (m, 3H), 8.36 (brs, 1H), 8.82 (d, J=6.8 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃+CD₃OD) δ 56.0, 94.80, 94.85, 113.8, 121.1, 121.2, 123.2, 123.3, 124.5, 127.5, 128.6, 136.4, 138.9, 139.0, 149.7, 157.1, 158.0, 158.1.

2-(3-Chlorophenylamino)-3-(hydroxy methyl)-4H-pyrido-[1,2-a]pyrimidin-4-one (207)

¹H NMR (400 MHz, CDCl₃) δ 4.95 (d, J=6.4 Hz, 2H), 6.93 (t, J=6.8 Hz, 1H), 7.05 (d, J=8.0 Hz, 1H), 7.38 (t, J=4.4 Hz, 2H), 7.42 (s, 1H), 7.63 (t, J=6.8 Hz, 1H), 7.81 (t, J=1.6 Hz, 1H), 8.20 (s, 1H), 8.92 (d, J=7.2 Hz, 1H).

2-(3-Fluorophenylamino)-3-(hydroxymethyl)-4H-pyrido[1,2-a]pyrimidine-3-carbaldehyde (208)

¹H NMR (400 MHz, CDCl₃) δ 4.94 (s, 2H), 6.94 (t, J=6.0 Hz, 2H), 7.17 (d, J=8.0 Hz, 1H), 7.43 (d, J=8.8 Hz, 2H), 7.63 (t, J=7.2 Hz, 2H), 7.70 (d, J=9.2 Hz, 1H), 8.26 (s, 1H), 8.93 (d, J=7.2 Hz, 1H).

3-(Hydroxymethyl)-2-(3-(trifluoromethyl)phenylamino)-4H-pyrido[1,2-a]pyrimidin-4-one (209)

¹H NMR (400 MHz, CDCl₃) δ 4.99 (s, 2H), 6.99 (d, J=6.0 Hz, 2H), 7.32 (d, J=8.0 Hz, 1H), 7.43 (d, J=7.6 Hz, 2H), 7.69 (brs, 2H), 8.06 (s, 1H), 8.27 (s, 1H), 8.96 (d, J=7.6 Hz, 1H).

3-(Hydroxymethyl)-2-(3-(trifluoromethoxy)phenylamino)-4H-pyrido[1,2-a]pyrimidin-4-one (210)

¹H NMR (400 MHz, CDCl₃) δ 4.95 (d, J=6.4 Hz, 2H), 6.84 (t, J=6.8 Hz, 1H), 6.92 (d, J=6.8 Hz, 1H), 7.30-7.34 (m, 3H), 7.59 (t, J=7.2 Hz, 1H), 7.86 (s, 1H), 8.36 (s, 1H), 8.87 (d, J=6.4 Hz, 1H),

Methyl 3-(3-(hydroxymethyl)-4-oxo-4H-pyrido[1,2-a]pyrimidin-2-ylamino)benzoate (211)

¹H NMR (400 MHz, CDCl₃) δ 3.92 (s, 3H), 4.99 (d, J=6.4 Hz, 2H), 6.96 (t, J=7.2 Hz, 1H), 7.38-7.42 (m, 2H), 7.63 (t, J=7.8 Hz, 1H), 7.75 (d, J=7.6 Hz, 1H), 7.88 (d, J=8.0 Hz, 1H), 8.21 (s, 1H), 8.25 (brs, 1H), 8.96 (d, J=7.6 Hz, 1H).

3-(3-(hydroxymethyl)-4-oxo-4H-pyrido[1,2-a]pyrimidin-2-ylamino)benzoic acid (212)

¹H NMR (400 MHz, CDCl₃) δ 4.73 (s, 1H), 5.74 (s, 2H), 7.19 (t, J=7.2 Hz, 1H), 7.38-7.42 (m, 2H), 7.45 (d, J=7.6 Hz, 1H), 7.86 (t, J=8.4 Hz, 1H), 8.00 (d, J=8.0 Hz, 1H), 8.19 (s, 1H), 8.82 (s, 1H), 8.89 (d, J=6.8 Hz, 1H).

2-(4-Chlorophenylamino)-3-(hydroxymethyl)-4H-pyrido[1,2-a]pyrimidin-4-one (213)

¹H NMR (400 MHz, DMSO) δ 4.05 (d, J=7.2 Hz, 2H), 7.37 (d, J=8.8Hz, 2H), 7.44 (d, J=8.8 Hz, 1H), 7.75 (d, J=6.8 Hz, 2H), 7.88 (t, J=8.8 Hz, 1H), 8.81 (s, 1H), 8.88 (d, J=6.4 Hz, 1H).

2-(2-Chlorophenylamino)-3-(hydroxymethyl)-4H-pyrido[1,2-a]pyrimidin-4-one (214)

¹H NMR (400 MHz, CDCl₃) δ 5.01 (d, J=5.6 Hz, 2H), 6.97-7.01 (m, 3H), 7.26-7.29 (m, 1H), 7.42 (t, J=8.8 Hz, 2H), 7.66 (t, J=7.2 Hz, 1H), 8.41 (t, J=5.2 Hz, 1H), 8.53 (s, 1H), 8.99 (d, J=6.8 Hz, 1H).

3-(Hydroxymethyl)-2-(3-hydroxyphenylamino)-4H-pyrido[1,2-a]pyrimidin-4-one (215)

¹H NMR (400 MHz, CDCl₃+CD₃OD) δ 4.81 (s, 2H), 6.53 (d, J=8.0 Hz, 1H), 6.99 (dd, J=6.8, 6.8 Hz, 1H), 7.04 (d, J=8.0 Hz, 1H), 7.12 (dd, J=6.8, 6.8 Hz, 1H), 7.18 (s, 1H), 7.42 (d, J=9.6 Hz, 1H), 7.64 (dd, J=6.8, 8.8 Hz, 1H), 8.88 (d, J=7.2 Hz, 1H).

3-(Hydroxymethyl)-2-(4-hydroxyphenylamino)-4H-pyrido[1,2-a]pyrimidin-4-one (216)

¹H NMR (400 MHz, CD₃OD) δ 4.83 (s, 2H), 6.77 (dd, J=2.0, 8.8 Hz, 2H), 7.04 (dd, J=6.8, 6.8 Hz, 1H), 7.32 (d, J=8.8 Hz, 1H), 7.34-7.67 (m, 2H), 7.67-7.73 (m, 1H), 8.84 (d, J=6.8 Hz, 1H).

3-(Hydroxymethyl)-2-(2-hydroxyphenylamino)-4H-pyrido[1,2-a]pyrimidin-4-one (217)

¹H NMR (400 MHz, CDCl₃+CD₃OD) δ 3.71 (s, 1H), 4.86 (s, 2H), 6.88 (ddd, J=1.6, 7.6, 8.0 Hz, 1H), 6.93 (dd, J=1.6, 8.0 Hz, 1H), 6.98 (ddd, J=1.6, 7.2, 8.0 Hz, 1H(, 7.05 (ddd, J=1.2, 6.8, 6.8 Hz, 1H), 7.43 (d, J=8.8 Hz, 1H), 7.69-7.73 (m, 2H), 8.91 (dd, J=0.8, 6.8 Hz, 1H).

2-(2,6-Dichlorophenylamino)-3-(hydroxymethyl)-4H-pyrido[1,2-a]pyrimidin-4-one (218)

¹H NMR (400 MHz, CDCl₃) δ 5.03 (d, J=6.0 Hz, 2H), 6.96 (t, J=7.2 Hz, 1H), 7.16 (t, J=7.6 Hz, 2H), 7.2 (s, 1H), 7.39 (d, J=8.0 Hz, 2H), 7.56 (t, J=7.6 Hz, 1H), 7.77 (s, 1H), 8.96 (d, J=7.2 Hz, 1H).

2-(3,5-Dichlorophenylamino)-3-(hydroxymethyl)-4H-pyrido[1,2-a]pyrimidin-4-one (219)

¹H NMR (400 MHz, CDCl₃) δ 4.97 (d, J=6.0 Hz, 2H), 7.01-7.04 (m, 2H), 7.50 (t, J=6.8 Hz, 1H), 7.60 (s, 2H), 7.71 (t, J=8.4 Hz, 2H), 8.24 (s, 1H), 8.98 (d, J=7.2 Hz, 1H).

2-(3,5-Difluorophenylamino)-3-(hydroxymethyl)-4H-pyrido[1,2-a]pyrimidin-4-one (220)

¹H NMR (400 MHz, CDCl₃) δ 4.99 (d, J=6.0 Hz, 2H), 6.52 (t, J=8.8 Hz, 1H), 7.05 (t, J=5.6 Hz, 2H), 7.29 (d, J=2.0 Hz, 2H), 7.51 (s, 1H), 7.72 (t, J=7.6 Hz, 1H), 8.30 (s, 1H), 8.99 (d, J=6.4 Hz, 1H).

2-(2,6-Dimethylphenylamino)-3-(hydroxymethyl)-4H-pyrido[1,2-a]pyrimidin-4-one (221)

¹H NMR (400 MHz, CDCl₃) δ 2.23 (s, 6H), 5.02 (d, J=6.4 Hz, 2H), 6.92 (t, J=6.8 Hz 1H), 7.12 (s, 3H), 7.20 (d, J=8.8 Hz, 1H), 7.33 (s, 1H), 7.53 (t, J=6.8 Hz, 1H), 8.94 (d, J=6.4 Hz, 1H).

3-(Hydroxymethyl)-2-phenoxy-4H-pyrido[1,2-a]pyrimidin-4-one (222)

¹H NMR (400 MHz, CDCl₃) δ 3.31 (brs, 1H), 4.86 (s, 2H), 7.03-7.09 (m, 3H), 7.13-7.18 (m, 1H), 7.28-7.34 (m, 3H), 7.58-7.62 (m, 1H), 8.94-8.96 (m, 1H); ¹³C NMR (100 MHz, CDCl₃) δ6.0, 99.7, 115.2, 121.7, 125.1, 125.3, 127.4, 129.3, 136.8, 149.2, 152.8, 159.6, 164.0.

2-(3-Fluorophenoxy)-3-(hydroxymethyl)-4H-pyrido[1,2-a]pyrimidin-4-one (223)

¹H NMR (400 MHz, CDCl₃) δ 3.62 (brs, 1H), 4.78 (s, 2H), 6.78-6.85 (m, 3H), 7.02 (ddd, J=1.2, 6.8, 7.2 Hz, 1H), 7.18-7.23 (m, 1H), 7.25 (d, J=9.2 Hz, 1H), 7.57-7.62 (m, 1H), 8.89 (d, J=6.8 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 55.3, 99.7, 109.4, 109.6, 111.7, 111.9, 115.2, 117.2, 117.3, 125.0, 127.3, 129.7, 129.8, 137.0, 149.0, 153.5, 153.6, 159.4, 161.4, 163.6, 163.8.

2-(3-Chlorophenoxy)-3-(hydroxymethyl)-4-pyrido[1,2-a]pyrimidin-4-one (224)

¹H NMR (400 MHz, CDCl₃) δ 3.51 (t, J=6.4 Hz, 1H), 4.79 (d, J=6.4 Hz, 2H), 6.95-6.98 (m, 1H), 7.04 (dd, J=6.8, 7.2 Hz, 1H), 7.08-7.10 (m, 1H), 7.20 (dd, J=8.4, 8.8 Hz, 1H), 7.27 (d, J=8.8 Hz, 1H), 7.59-7.63 (m, 1H), 8.91 9dd, J=0.4, 7.2 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 53.3, 55.4, 99.7, 115.3, 120.1, 122.2, 125.1, 127.4, 129.8, 134.3, 137.0, 153.2, 159.2, 163.6.

3-(Hydroxymethyl)-2-(phenylamino)-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one (225)

¹H NMR (400 MHz, CDCl₃) δ 1.85-1.93 (m, 4H), 2.15 (s, 2H), 2.84 (t, J=6.8 Hz, 2H), 3.87 (t, J=6.2 Hz, 2H), 7.06 (t, J=7.0 Hz, 1H), 7.26 (t, J=7.0 Hz, 2H), 7.51 (d, J=7.4 Hz, 2H), 11.2 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 14.6, 19.2, 22.2, 32.2, 42.4, 88.4, 122.9, 124.4, 128.8, 138.4, 160.5, 160.8, 162.2.

2-(3-Chlorophenylamino)-3-(hydroxymethyl)-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one (226)

¹H NMR (400 MHz, DMSO-d₆) δ 1.23-1.34 (m, 2H), 1.38-1.51 (m, 4H), 2.35-2.41 (m, 2H), 3.98-4.05 (m, 2H), 4.12 (s, 2H), 7.17-7.22 (m, 2H), 7.31 (t, J=2.0 Hz, 1H), 7.36 (t, J=8.0 Hz, 1H), 7.77 (s, 1H); ¹³C NMR (100 MHz, DMSO-d₆) δ 15.1, 23.1, 31.4, 42.4, 59.2, 61.4, 65.7, 122.8, 123.9, 125.6, 131.6, 134.3, 139.4, 157.9, 164.3

3-(Hydroxymethyl)-2-(3-(trifluoromethyl)phenylamino)-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one (227)

¹H NMR (400 MHz, DMSO-d₆) δ 1.19-1.38 (m, 2H), 1.48-1.54 (m, 2H), 1.70-1.73 (m, 2H), 2.38 (t, J=12.8 Hz, 1H), 3.98-4.06 (m, 2H), 4.13 (s, 2H), 7.47 (d, J=7.6 Hz, 1H), 7.52 (d, J=8.8 Hz, 1H), 7.55-7.59 (m, 2H), 7.83 (s, 1H); ¹³C NMR (100 MHz, DMSO-d₆) δ14.3, 22.2, 30.5, 41.5, 58.4, 77.9, 119.8, 121.2, 127.0, □ 129.8, 130.1, (d, J=26.8 due to CF₃), 138.2, 146.1, 157.1, 163.6, 169.1.

3-(Hydroxymethyl)-2-(2-hydroxyphenylamino)-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one (228)

¹H NMR (400 MHz, CDCl₃) δ 1.78-1.94 (m, 4H), 2.13-2.23 (m, 2H), 2.61 (t, J=6.0 Hz, 1H), 3.98-4.05 (m, 2H), 4.12 (s, 2H), 6.81 (t, J=7.2 Hz, 1H), 6.89 (d, J=7.2 Hz, 1H), 6.98-7.12 (m, 2H), 10.11 (s, 1H), 11.3 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 14.3, 21.4, 31.3, 42.1, 61.1, 87.7, 121.2, 126.4, 128.3, 128.6, 151.1, 161.3, 162.5, 163.7, 169.4.

3-(Hydroxymethyl)-2-(3-hydroxyphenylamino)-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one (229)

¹H NMR (400 MHz, CDCl₃) δ 1.41-1.61 (m, 4H), 1.62-1.77 (m, 2H), 2.72 (t, J=10.0 Hz, 1H), 3.78-3.95 (m, 2H), 4.17 (s, 2H), 6.43 (d, J=7.6 Hz, 1H), 6.81 (d, J=8.0 Hz, 1H), 6.87 (d, J=8.0 Hz, 1H), 6.98 (t, J=2.0 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 14.2, 21.8, 31.9, 42.4, 60.1, 79.8, 109.8, 111.6, 114.0, 129.4, 139.4, 149.7, 159.3, 160.2, 163.1.

3-(Hydroxymethyl)-2-(4-hydroxyphenylamino)-6,7,8,9-tetrahydro-4H-pyrido[1,2-a]pyrimidin-4-one (230)

¹H NMR (400 MHz, DMSO-d₆) δ 1.21-1.45 (m, 4H), 1.63-1.71 (m, 2H), 2.34 (t, J=12.8 Hz, 1H), 3.98-4.05 (m, 2H), 4.19 (s, 2H), 6.75 (d, J=8.8 Hz, 2H), 7.00 (d, J=8.8 Hz, 2H); ¹³C NMR (100 MI-Hz, DMSO-d₆) δ 14.9, 21.9, 32.1, 42.3, 60.4, 87.2, 115.7, 125.0, 130.1, 154.9, 159.4, 160.6, 163.3.

3-(Hydroxymethyl)-9-methyl-2-(phenylamino)-4H-pyrido[1,2-a]pyrimidin-4-one (231)

¹H NMR (400 MHz, CDCl₃) δ 2.40 (s, 3H), 2.97 (brs, 1H), 4.93 (s, 2H), 6.89 (t, J=6.8 Hz, 1H), 7.11 (t, J=7.2 Hz, 1H), 7.34 (t, J=7.6 Hz, 2H), 7.62 (d, J=6.4 Hz, 1H), 8.02 (d, J=8.0 Hz, 2H), 8.73 (d, J=6.8 Hz, 1H).

2-(3-Chlorophenylamino)-3-(hydroxymethyl)-9-methyl-4H-pyrido[1,2-a]pyrimidin-4-one (232)

¹H NMR (400 MHz, CDCl₃) δ 2.43 (s, 3H), 3.06 (t, J=6.4 Hz, 1H), 4.92 (d, 6.4 Hz, 2H), 6.69 (d, J=7.0 Hz, 1H), 7.03 (d, J=7.6 Hz, 1H), 7.23 (t, J=8.0 Hz, 1H), 7.29 (d, J=8.0 Hz, 1H), 7.44 (d, J=6.8 Hz, 1H), 8.03 (s, 1H), 8.38 (s, 1H), 8.71 (d, J=7.2 Hz, 1H).

2-((3-Chlorophenyl)(methyl)amino)-3-(hydroxymethyl)-9-methyl-4H-pyrido[1,2-a]pyrimidin-4-one (233)

¹H NMR (400 MHz, CDCl₃) δ 2.51 (s, 3H), 4.09 (t, J=6.8 Hz, 1H), 4.12 (d, J=7.2 Hz, 2H), 6.95 (t, J=7.0 Hz, 1H), 7.04-7.06 (m, 2H), 7.20 (t, J=8.4 Hz, 1H), 7.54 (d, J=6.8 Hz, 1H), 8.84 (d, J=7.2 Hz, 1H).

2-((3-Chlorophenyl)(methyl)amino)-3-(methoxymethyl)-9-methyl-4H-pyrido[1,2-a]pyrimidin-4-one (234)

¹H NMR (400 MHz, CDCl₃) δ 2.49 (s, 3H), 3.01 (s, 3H), 4.04 (s, 3H), 6.91 (t, J=7.0 Hz, 1H), 7.08 (d, J=8.4 Hz, 1H), 7.12 (d, J=7.2 Hz, 1H), 7.20 (s, 1H), 7.26 (t, J=8.0 Hz, 1H), 7.52 (d, J=6.8 Hz, 1H), 8.86 (d, J=7.2 Hz, 1H).

3-(Hydroxymethyl)-9-methyl-2-(3-(trifluoromethoxy)phenylamino)-4H-pyrido[1,2-a]pyrimidin-4-one (235)

¹H NMR (400 MHz, CDCl₃) δ 2.40 (s, 3H), 3.15 (t, J=6.2 Hz, 1H), 4.93 (d, J=6.4 Hz, 1H), 6.67 (t, J=7.0 Hz, 1H), 6.91 (d, J=8.0 Hz, 1H), 7.25-7.27 (m, 1H), 7.32 (t, J=8.2 Hz, 1H), 7.43 (d, J=6.8 Hz, 1H), 7.98 (s, 1H), 8.51 (s, 1H), 8.72 (d, J=6.8 Hz, 1H).

3-(Hydroxymethyl)-2-(3-hydroxyphenylamino)-9-methyl-4H-pyrido[1,2-a]pyrimidin-4-one (236)

¹H NMR (400 MHz, CDCl₃+CD₃OD) δ 2.44 (s, 3H), 4.75 (s, 2H), 6.45 (dd, J=2.4, 8.0 Hz, 1 h), 6.84 (dd, J=6.8, 6.8 Hz, 1H), 7.06 (dd, J=8.0, 8.4 Hz, 1H), 7.11 (dd, J=2.0, 2.4 Hz, 1H), 7.17 (dd, H=2.0, 8.0 Hz, 1H), 7.45 (d, J=6.8 Hzm 1H), 8.72 (d, J=7.2 Hz, 1H).

3-(Hydroxymethyl)-2-(4-hydroxyphenylamino)-9-methyl-4H-pyrido[1,2-a]pyrimidin-4-one (237)

¹H NMR (400 MHz, CDCl₃) δ 2.40 (s, 3H), 4.94 (d, J=4.8 Hz, 1H), 6.81-6.84 (m, 3H), 7.46 (d, J=7.2 Hz, 1H), 7.50 (d, J=8.8 Hz, 2H), 7.84 (s, 1H), 8.82 (d, J=7.2 Hz, 1H).

2-(4-tert-Butylphenylamino)-3-(hydroxymethyl)-9-methyl-4H-pyrido[1,2-a]pyrimidin-4-one (238)

¹H NMR (400 MHz, CDCl₃) δ 1.34 (s, 9H), 2.40 (s, 3H), 3.07 (t, J=6.2 Hz, 1H), 4.91 (d, J=6.4 Hz, 2H), 6.61 (t, J=6.8 Hz, 1H), 7.34 (d, J=7.2 Hz, 2H), 7.38 (d, J=6.8 Hz, 1H), 8.21 (br s, 1H), 8.69 (d, J=7.2 Hz, H).

2-(3-Chlorobenzylamino)-3-(hydroxymethyl)-9-methyl-4H-pyrido[1,2-a]pyrimidin-4-one (239)

¹H NMR (400 MHz, CDCl₃+CD₃OD) δ 2.31 (s, 3H), 3.02 (s, 1H), 4.68 (d, J=5.6 Hz, 2H), 4.70 (s, 2H), 6.70 (dd, J=5.6, 6.0 Hz, 1H), 6.74 (dd, J=6.8, 7.2 Hz, 1H), 7.11-7.20 (m, 3H), 7.31 (s, 1H), 7.38 (d, J=6.8 Hz, 1H), 8.66 (d, J=6.8 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃+CD₃OD) δ 17.7, 44.2, 44.3, 55.8, 93.1, 93.2, 112.6, 125.4, 125.5, 126.9, 127.5, 129.5, 132.6, 134.0, 134.9, 141.7, 149.45, 149.47, 157.4, 159.10, 159.16.

3-(Hydroxymethyl)-2-(isobutylamino)-9-methyl-4H-pyrido[1,2-a]pyrimidin-4-one (240)

¹H NMR (400 MHz, CDCl₃) δ 0.96 (d, J=6.8 Hz, 6H), 1.88-1.95 (m, 1H), 2.34 (s, 3H), 3.13 (brs, 1H), 3.32 (t, J=6.0 Hz, 2H), 4.78 (d, J=6.0 Hz, 2H), 6.08 (brs, 1H), 6.72 (t, J=6.8 Hz, 1H), 7.37 (d, J=6.8 Hz, 1H), 8.66 (d, J=6.8 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 17.9, 20.5, 28.9, 48.6, 57.1, 92.5, 112.1, 126.0, 132.5, 134.6, 149.6, 157.1, 159.5.

2-(Diethylamino)-3-(hydroxymethyl)-9-methyl-4H-pyrido[1,2-a]pyrimidin-4-one (241)

¹H NMR (400 MHz, CDCl₃) δ 1.22 (t, J=6.8 Hz, 6H), 2.35 (s, 3H), 3.41 (s, 1H), 3.63 (q, J=6.8 Hz, 4H), 4.44 (s, 2H), 6.65 (t, J=7.2 Hz, 1H), 7.31 (d, J=6.8 Hz, 1H), 8.68 (d, J=7.2 Hz, 1H) ¹³C NMR (100 MHz, CDCl₃) δ 13.9, 17.7, 44.0, 67.0, 92.2, 111.7, 125.8, 132.5, 134.4, 148.1, 160.7, 160.8.

2-(Cyclohexylmethylamino)-3-(hydroxymethyl)-9-methyl-4H-pyrido[1,2-a]pyrimidin-4-one (242)

¹H NMR (400 MHz, CDCl₃) δ 0.95-0.98 (m, 2H), 1.18-1.23 (m, 3H), 1.58-1.79 (m, 6H), 2.42 (s, 3H), 3.27 (t, J=6.4 Hz, 2H), 3.85 (brs, 1H), 4.74 (m, 2H), 6.21 (t, J=7.2 Hz, 1H), 6.68 (d, J=6.8 Hz, 1H), 7.33 (d, J=7.2 Hz, 1H), 8.57 (d, J=7.2 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 17.9, 26.2, 26.7, 31.3, 38.4, 47.5, 56.9, 92.8, 112.0, 126.0, 132.3, 134.5, 149.4, 156.9, 159.5.

3-(Hydroxymethyl)-9-methyl-2-morpholino-4H-pyrido[1,2-a]pyrimidin-4-one (243)

¹H NMR (400 MHz, CDCl₃) δ 2.01 (brs, 1H), 2.43 (s, 3H), 3.62 (t, J=4.8 Hz, 4H), 3.78 (t, J=4.8 Hz, 4H), 4.62 (s, 2H), 6.85 (t, J=6.8 Hz, 1H), 7.46 (d, J=6.8 Hz, 1H), 8.76 (d, J=6.8 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 17.9, 49.7, 58.9, 67.1, 95.5, 113.3, □ 125.2, 133.4, 135.0, 148.2, 160.6, 161.7.

3-(Hydroxymethyl)-9-methyl-2-morpholino-4H-pyrido[1,2-a]pyrimidin-4-one hydrochloride (244)

¹H NMR (400 MHz, CDCl₃) δ 2.43 (s, 3H), 3.42 (s, 1H), 3.62 (t, J=4.8 Hz, 4H), 3.78 (t, J=4.8 Hz, 4H), 4.62 (s, 2H), 6.85 (t, J=6.8 Hz, 1H), 7.46 (d, J=6.8 Hz, 1H), 8.76 (d, J=6.8 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 17.9, 49.7, 58.9, 67.1, 98.5, 113.3, 125.2, 133.4, 135.0, 148.2, 160.6, 161.7.

7-Bromo-2-(3-chlorophenylamino)-3-(hydroxymethyl)-4H-pyrido[1,2-a]pyrimidin-4-one (245)

¹H NMR (400 MHz, DMSO-d₆) δ 4.78 (s, 2H), 5.37 (s, 1H), 7.12 (dd, J=1.6 Hz, 8.4 Hz, 1H), 7.32 (d, J=8.0 Hz 1H), 7.42 (dd, J=1.6 Hz, 8.4 Hz, 1H), 7.54 (dd, J=0.8 Hz, 8.0 Hz, 1H), 7.64 (d, J=8.0 Hz 1H), 7.91 (d, J=2.0 Hz, 1H), 8.47 (s, 1H), 8.71 (s, 1H);

2-(3-Chlorophenylamino)-3-(hydroxymethyl)-7-methoxy-4H-pyrido[1,2-a]pyrimidin-4-one (246)

¹H NMR (400 MHz, DMSO-d₆) δ 3.86 (s, 3H), 4.70 (s, 2H), 5.22 (s, 1H), 7.02 (dd, J=0.8 Hz, 8.0 Hz, 1H), 7.28-7.32 (m, 1H), 7.41 (dd, J=1.2 Hz, 9.6 Hz, 1H), 7.58 (dd, J=0.8 Hz, 8.0 Hz, 1H), 7.64-7.68 (m, 1H), 7.87 (d, J=2.0 Hz, 1H), 8.36 (s, 1H), 8.69 (s, 1H)

2-(3-Chlorophenylamino)-3-(hydroxymethyl)-8-methoxy-4H-pyrido[1,2-a]pyrimidin-4-one (247)

¹H NMR (400 MHz, DMSO-d₆) δ 3.92 (s, 3H), 4.62 (s, 2H), 5.07 (s, 1H), 6.71 (d, J=2.8 Hz, 1H), 6.83 (dd, J=2.8 Hz, 8.0 Hz, 1H), 7.01 (d, J=8.0 Hz, 1H), 7.28 (dd, J=8.0 Hz, J=8.0 Hz, 1H), 7.62 (d, J=8.0 Hz, 1H), 7.76 (d, J=2.0 Hz, 1H), 8.62 (s, 1H), 8.71 (d, J=8.0 Hz, 1H); ¹³C NMR (100 MHz, DMSO-d₆) 54.8, 57.3, 93.8, 101.5, 109.3, 120.0, 120.9, 122.5, 129.5, 130.7, 133.4, 142.2, 151.9, 156.9, 157.8, 166.2.

8-Chloro-2-(3-chlorophenylamino)-3-(hydroxymethyl)-4H-pyrido[1,2-a]pyrimidin-4-one (248)

¹H NMR (400 MHz, CDCl₃) δ 4.68 (s, 2H), 5.14 (brs, 1H), 7.03 (dd, J=1.2, 8.0 Hz, 1H), 7.19 (dd, J=2.4, 7.6 Hz, 1H), 7.28 (t, J=8.0 Hz, 1H), 7.54, (d, J=2.0 Hz, 1H), 7.58 (dd, J=1.2, 8.4 Hz, 1H), 7.57 (t, J=2.0 Hz, 1H), 8.78 (d, J=8.0 Hz, 1H).

2-(3-Chlorophenylamino)-3-(hydroxymethyl)-8-(methylamino)-4H-pyrido[1,2-a]pyrimidin-4-one (249)

¹H NMR (400 MHz, CDCl₃) δ 2.81 (s, 3H), 3.85 (s, 2H), 6.02 (s, 1H), 6.32 (d, J=7.6 Hz, 1H), 6.93 (d, J=2 Hz, 1H), 7.12 (t, J=8.0 Hz, 1H), 7.38 (d, J=8.0 Hz, 1H), 7.81 (s, 1H), 8.42 (s, 1H), 9.93 (s, 1H).

2-(3-Chlorophenylamino)-8-(diethylamino)-3-(hydroxymethyl)-4H-pyrido[1,2-a]pyrimidin-4-one (250)

¹H NMR (400 MHz, CDCl₃) δ 1.23 (t, J=6.8 Hz, 6H), 3.44 (q, J=6.8 Hz, 4H), 3.99 (s, 2H), 4.82 (t, J=2.1 Hz, 1H), 6.29 (d, J=2.1 Hz, 1H), 6.54 (dd, J=2.4, 8.4 Hz, 1H), 6.92 (d, J=2 Hz, 1H), 7.21 (t, J=8.0 Hz, 1H), 7.81 (d, J=2.4 Hz, 1H), 8.06 (t, J=2.0 Hz, 1H), 8.85 (d, J=8.4 Hz, 1H), 9.71 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 12.7, 20.0, 44.7, 92.8, 97.1, 104.0, 118.9, 120.7, 121.9, 128.5, 129.5, 134.1, 142.8, 150.6, 151.9, 158.3, 159.2.

3-(Hydroxymethyl)-8-morpholino-2-(phenylamino)-4H-pyrido[1,2-a]pyrimidin-4-one (251)

¹H NMR (400 MHz, DMSO-d₆) δ 3.43 (s, 4H), 3.67 (s, 4H), 4.59 (d, J=5.2 Hz, 2H), 5.05, (t, J=4.8 Hz, 1H), 6.41 (d, J=2.0 Hz, 1H), 6.95 (t, J=7.2 Hz, 1H), 7.00 (dd, J=2.8, 8.4 Hz, 1H), 7.25 (t, J=8.0 Hz, 2H), 7.64 (d, J=7.6 Hz, 2H), 8.38 (s, 1H), 8.69 (d, J=8.0 Hz, 1H); ¹³C NMR (100 MHz, DMSO-d₆) δ 46.5, 55.1, 66.3, 91.5, 99.1, 105.4, 121.3, 122.6, 128.5, 129.1, 140.9, 151.4, 155.0, 156.7, 158.5.

2-(3-Fluorophenylamino)-3-(hydroxymethyl)-8-morpholino-4H-pyrido[1,2-a]pyrimidin-4-one (252)

¹H NMR (400 MHz, DMSO-d₆) δ 3.46 (s, 4H), 3.68 (s, 4H), 4.59 (d, J=5.2 Hz, 2H), 5.06, (t, J=5.2 Hz, 1H), 6.47 (d, J=2.4 Hz, 1H), 6.74 (t, J=7.2 Hz, 1H), 7.03 (dd, J=2.8, 8.0 Hz, 1H), 7.26 (t, J=7.2 Hz, 1H), 7.64 (d, J=8.0 Hz, 1H), 7.79 (d, J=12.4 Hz, 1H), 8.52 (s, 1H), 8.60 (d, J=8.0 Hz, 1H); ¹³C NMR (100 MHz, DMSO-d₆) δ 45.8, 54.2, 65.6, 91.3, 98.4, 105.0, 108.0 (d, J=20 Hz, due to F), 116.0, 128.0, 129.8 (d, J=10 Hz, due to F), 142.1 (d, J=11 Hz, due to F), 150.6, 154.4, 156.1, 157.4, 161.0, 163.3.

2-(3-Chlorophenylamino)-3-(hydroxymethyl)-8-morpholino-4H-pyrido[8,2-a]pyrimidin-4-one (253)

¹H NMR (400 MHz, DMSO-d₆) δ 3.45 (t, J=5.6 Hz, 4H), 3.69 (t, J=5.6 Hz, 4H), 4.58 (d, J=5.2 Hz, 2H), 5.01 (t, J=5.2 Hz, 1H), 6.42 (d, J=2.8 Hz, 1H), 6.98 (d, J=8.0 Hz, 1H), 7.05 (dd, J=2.8, 8.0 Hz, 1H), 7.26 (t, J=8.0 Hz, 1H), 7.64 (d, J=8.0 Hz, 1H), 7.80 (t, J=2.0 Hz, 1H), 8.48 (s, 1H), 8.60 (d, J=8.0 Hz, 1H); ¹³C NMR (100 MHz, DMSO-d₆) δ5.4, 53.6, 65.7, 84.7, 98.6, 105.3, 117.8, 118.7, 119.8, 127.1, 130.2, 129.2, 141.8, 149.7, 153.0, 155.3, 157.4; LC-MS (ESI, m/z): 386 [M+H]⁺.

3-(Hydroxymethyl)-8-(4-methylpiperazin-1-yl)-2-(phenylamino)-4H-pyrido[1,2-a]pyrimidin-4-one (254)

¹H NMR (400 MHz, CDCl₃) δ 2.34 (s, 3H), 2.52 (t, J=5.2 Hz, 4H), 3.43 (t, J=5.2 Hz, 4H), 4.88 (s, 2H), 5.28 (s, 1H), 6.37 (s, 1H), 6.55 (d, J=8.0 Hz, 1H), 7.05 (t, J=7.2 Hz, 1H), 7.33 (t, J=7.6 Hz, 2H), 7.60 (d, J=7.6 Hz, 2H), 7.91 (s, 1H), 8.64 (d, J=8.0 Hz, 1H).

2-(3-Chlorophenylamino)-3-(hydroxymethyl)-8-(4-methylpiperazin-1-yl)-4H-pyrido[1,2-a]pyrimidin-4-one (255)

¹H NMR (400 MHz, CDCl₃) δ 2.14 (s, 3H), 2.38 (t, J=4.4 Hz, 4H), 3.45 (t, J=4.4 Hz, 4H), 3.56 (s, 2H), 6.41 (d, J=2.4 Hz, 1H), 6.95 (dd, J=1.6, 8.0 Hz, 1H), 7.01 (dd, J=2.4, 8.0 Hz, 1H), 7.27 (t, J=8.0 Hz, 1H), 7.50 (d, J=1.6 Hz, 1H), 8.0 (d, J=8.0 Hz, 1), 10.4 (s, 1H), 14.18 (s, 1H); ¹³C NMR (100 MHz, CDCl₃) δ 45.6, 51.6, 54.0, 55.0, 85.3, 98.3, 105.1, 117.7, 118.5, 121.0, 127.9, 130.3, 133.0, 142.1, 150.8, 154.1, 156.4, 157.8; LC-MS (ESI, m/z): 400[M+H]⁺.

2-(3-Fluorophenylamino)-3-(hydroxymethyl)-8-(4-methylpiperazin-1-yl)-4H-pyrido[1,2-a]pyrimidin-4-one (256)

¹H NMR (400 MHz, CDCl₃) δ 2.35 (s, 3H), 2.54 (t, J=4.4 Hz, 4H), 3.48 (t, J=4.8 Hz, 4H), 4.87 (s, 2H), 5.23 (s, 1H), 6.42 (s, 1H), 6.60 (d, J=8.4 Hz, 1H), 6.73 (t, J=8.4 Hz, 1H), 7.12 (d, J=8.4 Hz, 1H), 7.19 (d, J=8.4 Hz, 1H), 7.71-7.75 (m, 1H), 8.04 (s, 1H), 8.71 (d, J=8.0 Hz, 1H).

2-(3-Chlorophenylamino)-3-(hydroxymethyl)-8-methyl-4H-pyrido[1,2-a]pyrimidin-4-one (257)

Colorless solid, mp 235° C. (decomp.); ¹H NMR (400 MHz, CDCl₃) δ 2.42 (s, 3H), 4.07 (q, J=7.2 Hz, 2H), 7.03 (d, J=8.8 Hz, 2H), 7.26 (t, J=8.0 Hz, 2H), 7.46 (d, J=8.4 Hz, 1H), 7.84 (t, J=2.0 Hz, 1H), 8.79 (d, J=7.2 Hz, 2H).

2-(4-Chlorophenylamino)-3-(hydroxymethyl)-8-methyl-4H-pyrido[1,2-a]pyrimidin-4-one (258)

Colorless solid, mp 227° C. (decomp.); ¹H NMR (400 MHz, CDCl₃) δ 2.42 (s, 3H), 4.10 (s, 2H), 6.85 (d, J=7.2 Hz, 1H), 7.23-7.28 (m, 4H), 7.87 (d, J=6.8 Hz, 2H), 8.94 (d, J=7.6 Hz, 1H).

2-(4-Fluorophenylamino)-3-(hydroxymethyl)-8-methyl-4H-pyrido[1,2-a]pyrimidin-4-one (259)

Colorless solid, mp 232° C. (decomp.); ¹H NMR (400 MHz, CDCl₃) δ 2.42 (s, 3H), 4.12 (s, 2H), 6.85 (d, J=6.8 Hz, 1H), 7.05 (t, J=8.4 Hz, 2H), 7.21 (s, 1H), 7.31-7.38 (m, 2H), 7.85 (q, J=4.8 Hz, 2H), 8.94 (d, J=7.2 Hz, 1H).

2-(3,4-Dichlorophenylamino)-3-(hydroxymethyl)-8-methyl-4H-pyrido[1,2-a]pyrimidin-4-one (260)

Colorless solid, mp 230° C. (decomp.); ¹H NMR (400 MHz, CDCl₃) δ 2.44 (s, 3H), 4.09 (s, 2H), 6.89 (d, J=7.2 Hz, 1H), 7.26 (s, 1H), 7.36 (d, J=8.8 Hz, 1H), 7.76 (d, J=8.4 Hz, 1H), 8.24 (d, J=2.4 Hz, 1H), 8.95 (d, J=7.2 Hz, 1H), 9.71 (s, 1H).

2-(3-Chloro-4-fluorophenylamino-3-(hydroxymethyl)-8-methyl-4H-pyrido[1,2-a]pyrimidin-4-one (261)

Colorless solid, mp 225° C. (decomp.); ¹H NMR (400 MHz, CDCl₃) δ 2.43 (s, 3H), 4.09 (s, 2H), 6.88 (d, J=7.2 Hz, 1H), 7.11 (t, J=8.8 Hz, 1H), 7.27 (s, 1H), 7.69-7.73 (m, 1H), 8.12 (d, J=6.8 Hz, 1H), 8.95 (d, J=7.2 Hz, 1H), 9.71 (s, 1H).

9-Chloro-2-(3-chlorophenylamino)-3-(hydroxymethyl)-4H-pyrido[1,2-a]pyrimidin-4-one (262)

Colorless solid, mp 230° C. (decomp.); ¹H NMR (400 MHz, CDCl₃) δ 4.95 (d, J=6.0 Hz, 2H), 6.80 (t, J=7.2 Hz, 1H), 7.06 (d, J=8.0 Hz, 1H), 7.27 (d, J=8.4 Hz, 1H), 7.46 (d, J=8.0 Hz, 1H), 7.78 (d, J=7.2 Hz, 1H), 8.18 (t, J=2.4 Hz, 1H), 8.43 (s, 1H), 8.81 (d, J=7.2 Hz, 1H).

2-(3-Chlorophenylamino)-3-(hydroxymethyl)-9-(trifluoromethyl)-4H-pyrido[1,2-a]pyrimidin-4-one (263)

¹H NMR (400 MHz, DMSO-d₆) δ 4.77 (s, 2H), 7.11-7.13 (m, 1H), 7.32 (dd, J=7.2, 7.2 Hz, 1H), 7.35 (dd, J=8.0, 8.0 Hz, 1H), 7.48-7.50 (m, 1H), 8.13-8.14 (m, 1H), 8.41 (d, J=7.2 Hz, 1H), 9.12 (dd, J=1.2, 7.2 Hz, 1H).

2-(3-Chlorophenylamino)-9-fluoro-3-(hydroxymethyl)-4H-pyrido[1,2-a]pyrimidin-4-one

¹H NMR (400 MHz, DMSO-d₆) δ4.76 (s, 1H), 5.31 (brs, 1H), 7.11-7.13 (m, 1H), 7.18-7.23 (m, 1H), 7.38 (dd, J=8.0, 8.0 Hz, 1H), 7.63-7.65 (m, 1H), 7.86 (dd, J=8.4, 8.8 Hz, 1H), 8.12-8.13 (m, 1H), 8.73 (d, J=7.2 Hz, 1H), 8.96 (brs, 1H).

2-(4-Chlorophenylamino)-9-fluoro-3-(hydroxymethyl)-4H-pyrido[1,2-a]pyrimidin-4-one (265)

¹H NMR (400 MHz, DMSO-d₆) δ 4.72 (s, 2H), 5.30 (brs, 1H), 7.15-7.20 (m, 1H), 7.41-7.44 (m, 2H), 7.79-7.82 (m, 2H), 7.84-7.86 (m, 1H), 8.72 (d, J=7.2 Hz, 1H), 8.92 (brs, 1H).

9-Fluoro-2-(4-fluorophenylamino)-3-(hydroxymethyl)-4H-pyrido[1,2-a]pyrimidin-4-one (266)

¹H NMR (400 MHz, DMSO-d₆) δ 4.75 (s, 2H), 5.25 (brs, 1H), 7.13-7.25 (m, 3H), 7.73-7.77 (m, 2H), 7.80-7.85 (m, 1H), 8.72 (d, J=7.2 Hz, 1H), 8.84 (brs, 1H). 2-(3-Chloro-4-fluorophenylamino)-9-fluoro-3-(hydroxymethyl)-4H-pyrido[1,2-a]pyrimidin-4-one (267)

¹H NMR (400 MHz, DMSO-d₆) δ4.74 (s, 2H), 5.24 (brs, 1H), 7.18-7.22 (m, 1H), 7.39-7.44 (m, 1H), 7.65-7.69 (m, 1H), 7.83-7.87 (m, 1H), 8.20-8.22 (m, 1H), 8.72 (d, J=7.2 Hz, 1H), 8.91 (brs, 1H).

2-(3,4-Difluorophenylamino)-9-fluoro-3-(hydroxymethyl)-4H-pyrido[1,2-a]pyrimidin-4-one (268)

¹H NMR (400 MHz, DMSO-d₆) δ 4.75 (s, 2H), 5.26 (brs, 1H), 7.17-7.22 (m, 1H), 7.39-7.49 (m, 1H), 7.84-7.88 (m, 1H), 8.08-8.14 (m, 1H), 8.73 (m, J=7.2 Hz, 1H), 8.93 (brs, 1H).

2-(3,4-Dichlorophenylamino)-9-fluoro-3-(hydroxymethyl)-4H-pyrido[1,2-a]pyrimidin-4-one (269)

¹H NMR (400 MHz, DMSO-d₆) δ 4.75 (s, 2H), 5.27 (brs, 1H), 7.19-7.23 (m, 1H), 7.60 (d, J=8.8 Hz, 1H), 7.7 (dd, J=2.8, 8.8 Hz, 1H), 7.85-7.89 (m, 1H), 8.83 (d, J=2.8 Hz, 1H), 8.73 (d, J=8.8 Hz, 1H), 9.00 (brs, 1H).

2-(1H-Indol-5-ylamino)-9-fluoro-3-(hydroxymethyl)-4H-pyrido[12-a]pyrimidin-4-one (270)

m.p=184-185° C.; ¹H NMR (400 MHz, DMSO-d₆) δ 4.70 (d, J=5.2 Hz, 2H), 5.18 (t, J=5.2 Hz, 1H), 6.35 (s, 1H), 7.00-7.04 (m, 1H), 7.23 (dd, 0.1=2 Hz, 8.8 Hz, 1H), 7.28-7.32 (m, 2H), 7.68 (dd, J=8 Hz, J=8 Hz, 1H), 7.82 (s, 1H), 8.61 (s, 1H), 8.64 (d, J=6 Hz, 1H), 10.98 (s, 1H); ¹³C NMR (100 MHz, DMSO-d₆) δ5.2, 94.6, 101.7 (d, J=5.2 Hz, due to F), 111.6, 112.1 (d, J=7.4 Hz, due to F), 113.7, 118.0, 119.8 (d, J=17.1 Hz, due to F), 124.2 (d, J=4.4 Hz, due to F), 126.5, 128.2, 131.9, 133.5, 151.6, 154.1, 156.3, 157.6.

3-(Hydroxymethyl)-9-methoxy-2-(phenylamino)-4H-pyrido[1,2-a]pyrimidin-4-one (271)

¹H NMR (400 MHz, DMSO-d₆) δ 3.93 (s, 3H), 4.71 (d, J=5.2 Hz, 2H), 5.29 (t, J=5.2 Hz, 1H), 6.97-7.01 (m, 1H), 7.06-7.10 (m, 1H), 7.27-7.32 (m, 3H), 7.83 (d, J=8.4 Hz, 2H), 8.47 (d, J=7.2 Hz, 1H), 8.68 (s, 1H).

3-(Hydroxymethyl)-9-methoxy-2-(phenylamino)-4H-pyrido[1,2-a]pyrimidine-4-thione (272)

¹H NMR (400 MHz, CDCl₃) δ 3.98 (s, 3H), 4.11 (d, J=7.2 Hz, 2H), 6.88 (t, J=8.0 Hz, 2H), 7.04 (t, J=7.2 Hz, 1H), 7.31 (t, J=7.2 Hz, 2H), 7.82 (d, J=7.6 Hz, 2H), 7.98 (s, 1H), 8.59 (d, J=5.6 Hz, 1H); ¹³C NMR (100 MHz, CDCl₃) 26.9, 57.1, 94.2, 111.8, 112.7, 119.9, 121.1, 123.3, 128.9, 139.8, 143.7, 151.3, 155.6, 158.6.

2-(3-Chlorophenylamino)-3-(hydroxymethyl)-9-methoxy-4H-pyrido[1,2-a]pyrimidin-4-one (273)

¹H NMR (400 MHz, DMSO-d₆) δ 3.94 (s, 3H), 4.68 (s, 2H), 6.99 (d, J=7.6 Hz, 1H), 7.09 (dd, J=7.2 Hz, J=7.2 Hz, 1H), 7.25-7.29 (m, 2H), 7.56 (d, J=8.0 Hz, 1H), 8.42 (s, 1H), 8.45 (d, J=6.8 Hz, 1H), 8.77 (s, 1H).

2-(4-Chlorophenylamino)-3-(hydroxymethyl)-9-methoxy-4H-pyrido[1,2-a]pyrimidin-4-one (274)

¹H NMR (400 MHz, DMSO-d₆) δ 3.90 (s, 3H), 4.65 (d, J=5.2 Hz, 2H), 5.19 (t, J=5.2 Hz, 1H), 7.03 (dd, J=7.2 Hz, 7.6 Hz, 1H), 7.23 (d, J=7.6 Hz, 1H), 7.29 (d, J=8.8 Hz, 2H), 7.85 (d, J=9.2 Hz, 2H), 8.42 (d, J=7.2 Hz, 1H), 8.72 (s, 1H).

2-(4-Fluorophenylamino)-3-(hydroxymethyl)-9-methoxy-4H-pyrido[1,2-a]pyrimidin-4-one (275)

¹H NMR (400 MHz, DMSO-d₆) δ 3.91 (s, 3H), 4.69 (d, J=5.2 Hz, 2H), 5.19 (t, J=5.2 Hz, 1H), 7.06 (t, J=6.8 Hz, 1H), 7.13 (t, J=8.8 Hz, 1H), 7.25 (d, J=7.6 Hz, 1H), 7.83-7.86 (m, 1H), 8.45 (dd, J=1.2 Hz, 7.2 Hz, 1H), 8.66 (s, 1H).

3-(Hydroxymethyl)-9-methoxy-2-(4-(trifluoromethoxy)phenylamino)-4H-pyrido[1,2-a]pyrimidin-4-one (276)

¹H NMR (400 MHz, DMSO-d₆) δ 3.96 (s, 3H), 4.67 (d, J=4.0 Hz, 2H), 5.20 (s, 1H), 7.07 (dd, J=7.2 Hz, J=7.2 Hz, 1H), 7.23 (s, 1H), 7.27 (d, J=8.0 Hz, 2H), 7.95 (dd, J=8.8 Hz, J=8.8 Hz, 2H), 8.45 (d, J=7.6 Hz, 1H), 8.78 (s, 1H).

3-(Hydroxymethyl)-9-methoxy-2-(4-(trifluoromethyl)phenylamino)-4H-pyrido[1,2-a]pyrimidin-4-one (277)

¹H NMR (400 MHz, DMSO-d₆) δ 3.97 (s, 3H), 4.72 (s, 2H), 5.32 (s, 1H), 7.14, (dd, J=7.2 Hz, 7.2 Hz, 1H), 7.33 (d, J=7.6 Hz, 1H), 7.64 (d, J=8.8 Hz, 2H), 8.11 (d, J=8.8 Hz, 2H), 8.49 (d, J=7.2 Hz, 1H), 9.09 (s, 1H).

2-(3-Chloro-4-fluorophenylamino)-3-(hydroxymethyl)-9-methoxy-4-pyrido[1,2-a]pyrimidin-4-one (278)

¹H NMR (400 MHz, DMSO-d₆) δ 3.95 (s, 3H), 4.69 (d, J=4.8 Hz, 2H), 5.16 (t, J=4.8 Hz, 1H), 7.10 (dd, J=7.2 Hz, 7.2 Hz, 1H), 7.30 (dd, J=0.8 Hz, 8.0 Hz, 1H), 7.32 (dd, J=9.2 Hz, 9.2 Hz, 1H), 7.61-7.65 (m, 1H), 8.46 (dd, J=0.8 Hz, 7.2 Hz, 1H), 8.59 (dd, J=2.8 Hz, 7.2 Hz, 1H), 8.76 (s, 1H).

2-(3,4-Difluorophenylamino)-3-(hydroxymethyl)-9-methoxy-4H-pyrido[1,2-a]pyrimidin-4-one (279)

m.p=231° C. (decomp.); ¹H NMR (400 MHz, CDCl₃) δ 3.92 (s, 3H), 4.66 (s, 2H), 5.17 (brs, 1H), 7.07 (dd, J=7.2 Hz, 7.2 Hz, 1H), 7.26-7.33 (m, 2H), 7.39-7.41 (m, 1H), 8.34-8.40 (m, 1H), 8.44 (d, J=7.2 Hz, 1H), 8.74 (s, 1H); ¹³C NMR (100 MHz, DMSO) δ 54.1, 56.8, 95.2, 109.1, 113.4, 116.0 (d, J=3.8 Hz, due to F), 116.8, 118.7, 137.5 (d, J=9.7 Hz, due to F), 143.2 (d, J=11.9 Hz, due to F), 145.6, 147.5 (d, J=13.4 Hz, due to F), 149.9 (d, J=13.4 Hz, due to F), 150.6, 155.5.

2-(3-Chloro-4-hydroxyphenylamino)-3-(hydroxymethyl)-9-methoxy-4H-pyrido[1,2-a]pyrimidin-4-one (280)

¹H NMR (400 MHz, DMSO-d₆) δ 3.93 (s, 3H), 4.68 (s, 2H), 5.14 (s, 1H), 6.99 (d, J=8.4 Hz, 1H), 7.06 (dd, J=7.2 Hz, 7.2 Hz, 1H), 7.26 (dd, J=1.2 Hz, 8.0 Hz, 1H), 7.38 (dd, J=1.2 Hz, 8.0 Hz, 1H), 8.25 (d, J=2.8 Hz, 1H), 8.45 (dd, J=1.2 Hz, 7.2 Hz, 1H), 8.52 (s, 1H), 9.79 (s, 1H).

2-(3,4-Dichlorophenylamino)-3-(hydroxymethyl)-9-methoxy-4H-pyrido[1,2-a]pyrimidin-4-one (281)

¹H NMR (400 MHz, DMSO-d₆) δ 3.93 (s, 3H), 4.66 (d, J=5.2 Hz, 2H), 5.16 (d, J=5.2 Hz, 1H), 7.09 (t, J=7.2 Hz, 1H), 7.29 (d, J=6.8 Hz, 1H), 7.48 (d, J=8.8 Hz, 1H), 7.64 (dd, J=2.8 Hz, 8.8 Hz, 1H), 8.44 (d, J=7.2 Hz, 1H), 8.67 (d, J=2.8 Hz, 1H), 8.82 (s, 1H).

3-(Hydroxymethyl)-9-methoxy-2-(4-methyl-3-(trifluoromethyl)phenylamino)-4H-pyrido[1,2-a]pyrimidin-4-one (282)

¹H NMR (400 MHz, DMSO-d₆) δ 2.49 (t, J=2.0 Hz, 3H due to CF₃), 3.93 (s, 3H), 4.70 (d, J=4.8 Hz, 2H), 5.19 (t, J=4.8 Hz, 1H), 7.10 (t, J=7.2 Hz, 1H), 7.29 (dd, J=1.2 Hz, 8.0 Hz, 1H), 7.32 (d, J=8.4 Hz, 1H), 7.74 (dd, J=1.6 Hz, 8.0 Hz, 1H), 8.46 (dd, J=1.2 Hz, 6.8 Hz, 1H), 8.81 (s, 1H), 8.85 (d, J=2.0 Hz, 1H).

2-(4-Fluoro-3-(trifluoromethyl)phenylamino)-3-(hydroxymethyl)-9-methoxy-4H-pyrido[1,2-a]pyrimidin-4-one (283)

¹H NMR (400 MHz, DMSO-d₆) δ3.92 (s, 3H), 4.68 (d, J=5.2 Hz, 2H), 5.12 (t, J=5.2 Hz, 1H), 7.07 (dd, J=7.2 Hz, 7.2 Hz, 1H), 7.27 (d, J=7.2 Hz, 1H), 7.37-7.42 (m, 1H), 7.86-7.88 (m, 1H), 8.43 (d, J=7.2 Hz, 1H), 8.87 (s, 1H), 8.99-9.00 (m, 1H).

2-(2,3-Dihydro-1H-inden-5-ylamino)-3-(hydroxymethyl)-9-methoxy-4H-pyrido[1,2-a]pyrimidin-4-one (284)

¹H NMR (400 MHz, DMSO-d₆) δ 1.97-2.05 (m, 2H), 2.79 (t, J=7.6 Hz, 2H), 2.85 (t, J=7.6 Hz, 2H), 3.92 (s, 3H), 4.69 (d, J=5.6 Hz, 2H), 5.26 (t, J=5.6 Hz, 1H), 7.04 (dd, J=7.2 Hz, 1H), 7.12 (d, J=8.4 Hz, 1H), 7.24 (dd, J=0.8 Hz, 7.6 Hz, 1H), 7.46 (dd, J=2.0 Hz, 8.0 Hz, 1H), 7.82 (s, 1H), 8.45 (dd, J=1.2 Hz, 7.2 Hz, 1H), 8.59 (s, 1H).

2-(Benzo[d][1,3]dioxol-5-ylamino)-3-(hydroxymethyl)-9-methoxy-4H-pyrido[1,2-a]pyrimidin-4-one (285)

¹H NMR (400 MHz, DMSO-d₆) δ 3.91 (s, 3H), 4.68 (d, J=5.2 Hz, 2H), 5.21 (t, J=5.2 Hz, 1H), 5.98 (s, 2H), 6.84 (d, J=8.4 Hz, 1H), 7.05-7.07 (m, 1H), 7.26 (dd, J=1.2 Hz, 8.0 Hz, 1H), 7.82 (d, J=2.0 Hz, 1H), 8.46 (d, J=2.0 Hz, 1H), 8.45 (dd, J=1.2 Hz, 7.2 Hz, 1H), 8.56 (s, 1H).

2-(2,3-Dihydrobenzo[b][1,4]dioxin-6-ylamino)-3-(hydroxymethyl)-9-methoxy-4H-pyrido[1,2-a]pyrimidin-4-one (286)

¹H NMR (400 MHz, DMSO-d₆) δ 3.92 (s, 3H), 4.19-4.24 (m, 4H), 4.67 (d, J=5.2 Hz, 2H), 5.19 (t, J=5.2 Hz, 1H), 6.77 (d, J=8.8 Hz, 1H), 7.05 (dd, J=7.2 Hz, 7.2 Hz, 1H), 7.12 (dd, J=2.4 Hz, 8.4 Hz, 1H), 7.26 (d, J=6.8 Hz, 1H), 7.64 (d, J=2.4 Hz, 1H), 8.46 (dd, J=2.0 Hz, 7.2 Hz, 1H), 8.47 (s, 1H).

3-(Hydroxymethyl)-9-methoxy-2-(1-methyl-1H-indol-5-ylamino)-4H-pyrido[1,2-a]pyrimidin-4-one (287)

m.p=195-197° C.; ¹H NMR (400 MHz, DMSO-d₆) δ 3.82 (s, 3H), 3.97 (s, 3H), 4.77 (d, J=5.2 Hz, 2H), 5.28 (t, J=5.2 Hz, 1H), 6.42 (d, J=3.0 Hz, 1H), 7.09 (dd, J=7.2, 7.6 Hz, 1H), 7.28-7.30 (m, 1H), 7.33 (d, J=3.0 Hz, 1H), 7.41 (d, J=8.8 Hz, 1H), 7.46 (dd, J=2.0, 8.8 Hz, 1H), 8.18 (d, J=2.0 Hz, 1H), 8.52 (dd, J=1.2, 6.8 Hz, 1H), 8.62 (br s, 1H).

3-(Hydroxymethyl)-9-methoxy-2-(1-methyl-1H-benzo[d]imidazol-5-ylamino)-4H-pyrido[1,2-a]pyrimidin-4-one (288)

m.p=186° C. (decomp.); ¹H NMR (400 MHz, DMSO-d₆) δ 3.87 (s, 3H), 3.98 (s, 3H), 4.79 (d, J=5.6 Hz, 2H), 5.31 (t, J=5.6 Hz, 1H), 7.08 (dd, J=7.2, 7.2 Hz, 1H), 7.28 (dd, J=0.8, 7.6 Hz, 1H), 7.50 (d, J=8.8 Hz, 1H), 7.56 (dd, J=2.0, 8.8 Hz, 1H), 8.13 (s, 1H), 8.34 (d, J=1.6 Hz, 1H), 8.53 (dd, J=0.8, 7.2 Hz, 1H), 8.73 (br s, 1H).

3-(Hydroxymethyl)-9-methoxy-2-(1-methyl-1H-indazol-5-ylamino)-4H-pyrido[1,2-a]pyrimidin-4-one (289)

m.p=205° C. (decomp.); ¹H NMR (400 MHz, DMSO-d) δ 3.40 (s, 3H), 4.08 (s, 3H), 4.78 (d, J=4.8 Hz, 2H), 5.28 (t, J=5.0 Hz, 1H), 7.12 (dd, J=7.2, 7.6 Hz, 1H), 7.32 (1H, J=1.2, 7.6 Hz, 1H), 7.62 (d, J=9.0 Hz, 1H), 7.68 (dd, J=2.0, 9.0 Hz, 1H), 8.04 (m, 1H), 8.07 (d, J=1.2 Hz, 1H), 8.53 (dd, J=1.2, 6.8 Hz, 1H), 8.75 (br s, 1H).

9-(Difluoromethoxy)-2-(4-fluorophenylamino)-3-(hydroxymethyl)-4H-pyrido[1,2-a]pyrimidin-4-one (290)

¹H NMR (400 MHz, DMSO-d₆) δ 4.67 (d, J=5.2 Hz, 2H), 5.14 (t, J=5.2 Hz, 1H), 7.07-7.11 (m, 3H), 7.17 (t, J=74 Hz due to F₂, 1H), 7.63-7.69 (m, 3H), 8.71 (d, J=7.2 Hz, 1H), 8.75 (s, 1H).

2-(4-Chlorophenylamino)-9-(difluoromethoxy)-3-(hydroxymethyl)-4H-pyrido[1,2-a]pyrimidin-4-one (291)

¹H NMR (400 MHz, DMSO-d₆) δ 4.69 (d, J=5.6 Hz, 2H), 5.23 (t, J=5.2 Hz, 1H), 7.13 (dd, J=7.2 Hz, 7.2 Hz, 1H), 7.23 (t, J=74 Hz, 1H, due to F₂), 7.30-7.33 (m, 2H), 7.72-7.75 (m, 3H), 8.75 (dd, J=1.2 Hz, 7.2 Hz, 1H), 8.86 (s, 1H);

9-(Difluoromethoxy)-2-(3,4-difluorophenylamino)-3-(hydroxymethyl)-4H-pyrido[1,2-a]pyrimidin-4-one (292)

¹H NMR (400 MHz, DMSO-d₆) δ 4.70 (d, J=5.2 Hz, 2H), 5.22 (s, 1H), 7.16 (dd, J=7.2 Hz, J=7.2 Hz, 1H), 7.26 (t, J=74 Hz, due to F2, 1H), 7.33-7.38 (m, 2H), 7.75 (d, J=7.2 Hz, 1H), 8.12 (dd, J=7.6 Hz, 12.8 Hz, 1H), 8.76 (d, J=6.8 Hz, 1H), 8.90 (s, 1H); LC-MS (ESI, m/z): 370[M+H]⁺.

2-(3,4-Dichlorophenylamino)-9-(difluoromethoxy)-3-(hydroxymethyl)-4H-pyrido[1,2-a]pyrimidin-4-one (293)

¹H NMR (400 MHz, DMSO-d₆) δ 4.68 (s, 2H), 5.19 (s, 1H), 7.15 (t, J=7.2 Hz, 1H), 7.24 (t, J=74 Hz, due to F₂, 1H), 7.47-7.57 (m, 2H), 7.72 (d, J=7.2 Hz, 1H), 8.32 (d, J=2.4 Hz, 1H), 8.73 (dd, J=1.6 Hz, 7.2 Hz, 1H), 8.92 (s, 1H).

2-(3-Chloro-4-fluorophenylamino)-9-(difluoromethoxy)-3-(hydroxymethyl)-4H-pyrido[1,2-a]pyrimidin-4-one (294)

¹H NMR (400 MHz, DMSO-d₆) δ 4.68 (d, J=4.0 Hz, 2H), 5.18 (s, 1H), 7.15 (dd, J=7.2 Hz, 7.2 Hz, 1H), 7.24 (t, J=74 Hz, 1H, due to F₂), 7.32 (dd, J=9.2 Hz, 9.2 Hz, 1H), 7.50-7.54 (m, 1H), 7.73 (d, J=7.6 Hz, 1H), 8.22 (dd, J=2.8 Hz, 6.8 Hz, 1H), 8.74 (dd, J=1.2 Hz, 7.2 Hz, 1H), 8.86 (s, 1H).

2-(1H-Indol-5-ylamino)-9-(difluoromethoxy)-3-(hydroxymethyl)-4H-pyrido[1,2-a]pyrimidin-4-one (295)

¹H NMR (400 MHz, DMSO-d₆) δ 4.72 (d, J=4.8 Hz, 2H), 5.23 (t, J=4.8 Hz, 1H), 6.34 (s, 1H), 7.05-7.09 (m, 1H), 7.23 (dd, J=8.8 Hz, 8.8 Hz, 1H), 7.25 (t, J=74.4 Hz, 1H due to F₂), 7.31-7.33 (m, 2H), 7.68 (d, J=7.2 Hz, 1H), 7.93 (s, 1H), 8.70 (s, 1H), 8.73 (d, J=1.2 Hz, 1H), 10.99 (s, 1H).

2-(3-chlorophenylamino)-3-(hydroxymethyl)-6,8-dimethyl-4H-pyrido[1,2-a]pyrimidin-4-one (296)

¹H NMR (400 MHz, CDCl₃) δ 2.32 (s, 3H), 2.40 (s, 3H), 3.55 (s, 2H), 6.78 (s, 1H), 7.06 (d, J=2.0 Hz, 1H), 7.21 (dd, J=8.0 Hz, J=8.0 Hz, 1H), 7.39 (d, J=8.4 Hz, 1H), 7.69 (d, J=2.0 Hz, 1H), 7.71 (s, 1H), 9.60 (s, 1H); LC-MS (ESI, m/z): 330 [M+H]⁺.

7,9-Dichloro-2-(3-chlorophenylamino)-3-(hydroxymethyl)-4H-pyrido[1,2-a]pyrimidin-4-one (297)

¹H NMR (400 MHz, DMSO-d₆) δ 4.65 (s, 2H), 5.70 (d, J=7.6 Hz, 1H), 7.29 (dd, J=8.0 Hz, J=8.0 Hz, 1H), 7.57 (dd, J=8.0 Hz, J=8.0 Hz, 1H), 8.25 (s, 1H), 8.32 (d, J=2.0 Hz, 1H), 8.76 (d, J=2.0 Hz, 1H).

2-(3-Chlorophenylamino)-7,9-difluoro-3-(hydroxymethyl)-4H-pyrido[1,2-a]pyrimidin-4-one (298)

¹H NMR (400 MHz, CDCl₃) δ 4.69 (d, J=4.8 Hz, 2H), 5.31 (t, J=4.8 Hz, 1H), 7.06 (dd, J=1.2 Hz, 8.0 Hz, 1H), 7.32 (t, J=8.0 Hz, 1H), 7.56 (dd, J=1.2 Hz, 8.0 Hz, 1H), 8.02 (s, 1H), 8.18-8.23 (m, 1H), 8.68 (t, J=2.0 Hz, 1H), 8.90 (s, 1H).

(4-Oxo-2-(phenylamino)-4H-pyrido[1,2-a]pyrimidin-3-yl)methyl benzoate (299)

m.p=178-179° C.; ¹H NMR (400 MHz, DMSO-d₆) δ 5.66 (s, 2H), 6.96 (ddd, J=1.2, 1.2, 6.8 Hz, 1H), 7.06-7.10 (m, 1H), 7.33-7.44 (m, 5H), 7.53-7.56 (m, 1H), 7.61-7.65 (m, 1H), 7.72 (m, 2H), 8.12 (dd, J=1.2, 8.4 Hz, 1H), 9.14 (brs, 1H).

(4-Oxo-2-(phenylamino)-4H-pyrido[1,2-a]pyrimidin-3-yl)methyl acetate (300)

m.p=160-161° C.; ¹H NMR (400 MHz, CDCl₃) δ 2.13 (s, 3H), 6.92 (dd, J=6.8, 7.2 Hz, 1H), 7.04-7.08 (m, 1H), 7.30-7.37 (m, 3H), 7.59-7.66 (m, 3H), 8.91 (brs, 1H), 8.94 (d, J=7.2 Hz, 1H).

(4-Oxo-2-(phenylamino)-4H-pyrido[1,2-a]pyrimidin-3-yl)methyl isobutyrate (301)

m.p=161-163° C.; ¹H NMR (400 MHz, CDCl₃) δ 1.17 (d, J=7.2 Hz, 6H), 2.62-2.65 (m, 1H), 6.94 (dd, J=6.8, 7.2 Hz, 1H), 7.04-7.08 (m, 1H), 7.31-7.38 (m, 3H), 7.60-7.67 (m, 3H), 8.95 (brs, 1H), 8.95 (d, J=6.8 Hz, 1H).

Example 8 Additional Studies on Dinitrobenzamide Compounds

Two representative molecules, compounds 4 and 24, were re-synthesized in-house and subjected to conventional CFU-based activity testing in primary macrophages (FIG. 7). A ten-fold decrease in the number of CFUs, similar to that seen with INH, was observed for both compounds five days after infection on three different cell lines. This confirms the potency of this series of compounds.

To address the issue of toxicity, compounds 4 and 24 were tested on a panel of five cell lines derived from different body tissue. Cells were incubated with increasing amounts of compound and cell viability was assessed with resazurin after 5 days of co-incubation. Percentage cytotoxicity was determined by taking as a reference the resofurin fluorescence measured by DMSO containing wells. The concentration where fifty percent of the cells died was defined as the Minimal Toxic Concentration (MTC₅₀). Both compounds 4 and 24 showed no cytotoxicity against the panel of cell lines suggesting this series of compounds to be promising new anti-tuberculosis drugs (Table 4).

To gain insight into the possible specificity of activity of compounds 4 and 24, analysis of the broad antimicrobial spectrum was undertaken and showed that the effect of these dinitrobenzamide derivatives was mainly restricted to actinomycetes with the most potent activity observed against Mycobacterium (Table 4). Of particular importance, the tested DNB were also highly active against multidrug-resistant (MDR) and extensively drug-resistant (XDR) clinical isolates, suggesting that they might act on different targets than current antituberculosis compounds.

Mutation frequency of M. tuberculosis H37Rv was determined for compounds 4 and 24. Increasing numbers of bacteria grew on 7H10 agar medium supplemented with different concentrations of compounds. After a 6-week growth, colonies were counted in order to evaluate the proportion of spontaneous mutational frequency (Table 6). For compound 4, 1×10⁻⁶ and 1×10⁻⁸ frequencies of resistance were found at 0.2 μg/ml and 3.2 μg/ml, respectively. Spontaneous mutational rate was therefore calculated to be 1×10⁻⁷. For compound 24, at 0.2 μg/ml and 3.2 μg/ml, frequency of mutation was 7×10⁻⁷ and 1×10⁻⁸, respectively which corresponds to a mean frequency of 3.5×10⁻⁷. Overall, these values were superior to frequency of mutation observed for INH-resistant mutants (3×10⁻⁶). These results, thus, demonstrate that this class of compounds result in a low frequency of mutation.

Example 9 Additional Studies on Pyridopyrimidinone Compounds

Table 5 shows the minimal inhibitory concentration (MIC) of one representative compound, 133, on different Mycobacterial species. While it has no effect on the fast growing Mycobacterium smegmatis mc², it was able to inhibit typical laboratory strains such as H37Rv, H37Ra and BCG Pasteur with an MIC of 2 μM. More importantly, the antimicrobial activity of 133 was also tested against clinical isolates strains of mycobacteria. The MIC values for multi-drug-resistant (MDR-TB) and extensive-drug-resistant (XDR-TB) isolates strains were within the micromolar range.

To address the issue of toxicity, compound 133 was tested on a panel of seven cell lines derived from different body tissue. Cells were incubated with increasing amounts of compound and cell viability was assessed with resazurin after 5 days of co-incubation. Percentage of cytotoxicity was determined by taking as a reference the resofurin fluorescence measured by DMSO containing wells. The concentration where fifty percent of the cells died was defined as the Minimal Toxic Concentration (MTC₅₀). Compound 133 showed no cytotoxicity for all tested cell lines up to 100 μM (Table 5). The selectivity index, which consists of the ratio between antitubercular activity and cytotoxicity was therefore above 50 for both extracellular and intracellular mycobacteria suggesting this series of compounds to be promising new anti-tuberculosis drugs.

The effect of this series of compounds on primary macrophages was further determined. Host cells that had priory been incubated with compound 232 harbored fewer bacteria compared to DMSO control and were more abundant at day 5 after infection as shown in FIG. 8. Similar data were obtained for compound 133 (data not shown). Conventional CFU determination was then performed seven days after infection to quantify the remaining bacterial load. A ten-fold decrease in the number of CFUs, similar to that seen with INH, was observed for both compounds on both human and mouse cells (FIG. 8). This confirms the potency of this series of compounds.

Mutation frequency of M. tuberculosis H37Rv was determined for compound 264. Increasing numbers of bacteria grew on 7H10 agar medium supplemented with different concentrations of compound. After a 6-week growth, colonies were counted in order to evaluate the proportion of spontaneous mutational frequency (Table 6). Compound 264 gave frequencies of resistance of 3.4×10⁻⁶ and 8×10⁻⁶ at 0.4 and 0.8 μg/ml, respectively, and 2×10⁻⁸ at both 1.6 μg/ml and 3.2 μg/ml. Accordingly, spontaneous mutational rate was calculated to be 7×10⁻⁷. Overall, these values are better than the frequency of mutation observed for INH (2.9×10⁻⁶). These results, therefore, demonstrate that this class of compounds result in a low frequency of mutation.

One of the current challenges for TB drug discovery is the identification of compounds that are active against persistent bacteria. Although the location and state of latent bacteria remains a matter of debate, one commonly shared hypothesis for mycobacterial persistence is that M. tuberculosis bacilli are able to survive in macrophages for prolonged periods of time and, unlike other bacteria, are able to actively replicate. The intraphagosomal profile of M. tuberculosis is complex; a large variety of genes are over-expressed and timely regulated and are also dependent on environmental factors. Altogether, this makes the identification of one specific tubercle factor that could be selected as the ideal target difficult. Consequently, non-target cell-based assays are a critical tool in the search of intracellular M. tuberculosis inhibitors.

Investigation of bacillus growth inhibitors within macrophages has long been limited due to cumbersome CFU plating, slow bacillus growth, safety requirements and difficulties in setting-up appropriate infection conditions. As a consequence, this approach was always used as a secondary assay after the initial selection of compounds that are active on in vitro extracellular growth. With the advent of automated confocal microscopy, the above mentioned limitations could be readdressed and the inventors show the feasibility of large scale compound screening. It was decided to perform suspension macrophage batch infection in order to minimize the steps and to meet safety requirements. To this end, careful attention was paid to the removal of the extracellular non-phagocytosed mycobacteria. The centrifugation conditions used during the wash steps were set up in order to recover only the infected cells and discard most of the extracellular bacteria. By microscopy the inventors confirmed that unbound mycobacteria represented less than 10% of the total bacterial load (data not shown). Mycobacteria are able to grow independently of host cells and consequently any remaining extracellular bacilli would greatly compromise the validity of the inventors' model. To this end, an additional amikacin treatment step was added to the protocol to further eliminate any remaining mycobacteria. Thus with the optimized protocol, there is almost no non-phagocytosed mycobacteria left by the time compound is added. The obtained results also demonstrate that it is specifically the effect on the intracellular mycobacteria that is being measured with compound treatment. Indeed, the inventors observed a weak inhibition with rifampin, an antibiotic that is known to poorly penetrate cells. The 50-fold reproducible decrease in MIC for rifampin in the intracellular assay compared to the in vitro growth assay proved that the targeted bacteria are not extracellular. Otherwise no difference would have been seen in MIC between the two assays. Similarly, compounds able to inhibit mycobacterial growth in the phenotypic cell-based assay, but not the in vitro growth assay were also identified. In addition, the fact that the compounds are mixed with previously infected cells should decrease the chance for the identification of primary infection inhibitors. However, such compounds may still be identified as blockers of neighboring cell infection.

Compared to a conventional CFU-plating method, the microscopy based detection of fluorescent bacteria is not sufficiently sensitive to distinguish between dead and live bacilli as the GFP signal is stable for several days. Indeed, at a high concentration of INH, rifampin or active compound, there is always 10% of the cells that appear to be infected, which is similar to the initial infection ratio. Surprisingly, no CFU could be recovered after plating such samples. Owing to the fact that latent bacilli are able to recover growth (Cho et al., 2007), the microscopy-detected bacilli must be dead bacilli rather than latent bacilli. Thus, the inventors' assay detects compounds that interfere with bacilli growth within macrophages.

As it is well established and confirmed (FIG. 1 a), macrophages are able to support high bacterial loads which end up encompassing a large part of the cell cytoplasm and eventually lead to macrophage cell death. It is obvious when M. tuberculosis is the infectious agent compared to BCG (Bacille Calmette-Guerin), which even at high MOI fails to induce much cytotoxicity (data not shown). Taking this into account, it was decided to set the data acquisition at day 5 post-infection when the cell number in the DMSO samples had significantly decreased relative to the antibiotically protected controls. Thus, monitoring cell number was an additional parameter enabling the inventors to confirm the compound's antibacterial activity.

Unlike direct fluorescence based assays, analysis for image-based assays proved to be much more variable. Several parameters that are inherent to the biology of the assay partially explain the lower Z′-values that are usually accepted for HTS validation. The remaining fluorescent dead bacilli do not have much of an impact on the Z′-value, rather the variability in the infection ratio for the DMSO controls seems to account for the discrepancy. Also of importance is the fact that, upon infection, the macrophages had a tendency to migrate which in turn led to a heterogeneous set of images (FIG. 2 a). However, the aim of the primary screen was to identify compounds fully active at a concentration of 20 μM. Thus, for this purpose, a positive Z′ for the infection ratio (INH/DMSO) was considered an acceptable value. The best proof of the validity of the hit selection according to the present invention comes from the subsequent serial dilution analysis, whereby almost 100% of the hits were confirmed. For each of the hits, a nicely fitted dose-response curve for the infection ratio was obtained as well as for the non-toxic compound in terms of cell number. Again, cell number brought an additional confirmation of the results that is totally independent of green fluorescence emission and GFP expression.

Obviously compounds found to be active against both intracellular and in vitro M. tuberculosis growth are the most promising. The best inhibitors isolated from this library have an inhibitory activity within the same range as INH. Further structure activity relationship studies will contribute to determine if their activity could be improved. In the course of another study using this phenotypic cell-based model, MIC down to the ng/mL scale was obtained for compounds with known in vitro antibacterial efficacy showing that compounds with a lower MIC than INH can be identified by the assay according to the present invention (data not shown). Of utmost interest are the compounds that are active only in the intracellular bacteria assay as they are likely to have a new mechanism of action independent of the infecting strain suggesting that they may also be active on the non-curable multi-drug-resistant (MDR)-strains.

Taken together, the above results show that monitoring M. tuberculosis growth with automated fluorescence microscopy is highly robust and reliable and that this method enables fast selection of potent anti-TB compounds.

TABLE 1 QIM QIM QIM QUM QUM QUM QIM QIM QIM Confirm Confirm Confirm Confirm Confirm Confirm Primary Confirm Confirm Confirm Primary % % % Primary % % % QIM CellNb CellNb CellNb QIM % Inhibition Inhibition Inhibition QUM % Inhibition Inhibition Inhibition ID Structure CellNb 20 uM 2 uM 0.2 uM Inhibition 20 uM 2 uM 0.2 uM Inhibition 20 uM 2 uM 0.2 uM IPK00000132

88.3 113.8 208.5 241.4 25.4 50.7 0.2 10.3 99.9 89.1 41.2 43.9 IPK00000190

435.5 317.6 173.6 190.0 91.9 96.5 13.2 12.7 2.9 42.3 29.4 34.6 IPK00000203

77.0 148.0 92.0 241.4 −28.5 −12.3 7.7 −2.0 99.7 69.7 52.4 32.5 IPK00000217

235.5 249.8 541.6 472.3 26.6 24.5 70.4 54.5 98.9 49.7 67.4 56.9 IPK00000287

350.3 412.9 246.1 315.9 65.9 66.0 −1.3 11.4 −13.8 36.4 36.1 45.9 IPK00000301

373.5 248.3 457.3 232.6 88.2 40.4 77.1 4.7 98.7 43.0 82.8 46.4 IPK00000389

72.5 103.0 200.6 265.3 27.7 84.6 86.6 20.1 100.3 67.0 76.5 44.0 IPK00000390

78.0 133.4 75.6 142.3 15.7 67.9 43.2 2.2 99.7 72.7 68.8 44.0 IPK00000391

63.0 128.8 148.9 220.9 31.6 76.4 36.8 2.9 99.6 76.7 41.4 46.6 IPK00000635

424.3 328.8 320.9 262.8 97.6 65.2 22.8 17.7 42.0 43.4 41.9 23.7 IPK00000731

61.3 166.5 308.8 393.1 −28.2 25.8 14.7 45.7 76.6 80.8 33.0 41.0 IPK00000802

305.8 484.5 218.8 306.6 83.2 98.0 9.3 0.7 34.8 98.2 31.9 36.4 IPK00000812

396.3 248.0 225.6 292.9 64.1 78.4 18.9 2.7 97.2 48.0 39.7 36.5 IPK00000933

314.5 333.6 475.9 264.8 79.9 56.9 92.5 8.5 30.3 69.8 44.5 31.8 IPK00000941

345.8 446.5 488.3 257.8 92.9 99.6 92.8 19.6 97.7 99.4 59.6 28.3 IPK00000942

376.5 255.0 473.5 326.3 93.1 97.9 92.3 21.3 92.6 100.0 50.3 28.8 IPK00000978

454.5 376.1 414.4 325.5 102.6 88.6 50.2 17.0 39.5 100.1 61.1 30.0 IPK00001006

322.8 380.9 344.9 412.0 81.0 81.8 18.0 17.1 98.4 39.2 43.1 39.5 IPK00001119

190.8 279.1 80.0 248.8 60.0 47.6 31.6 9.7 90.5 43.1 93.2 67.2 IPK00001165

145.5 201.1 336.5 259.6 6.5 41.9 23.4 4.7 100.0 96.3 40.6 39.8 IPK00001367

358.0 457.3 545.1 452.5 98.7 66.7 102.1 84.1 98.7 69.7 90.2 49.4 IPK00001368

276.3 438.8 528.8 400.1 65.0 67.2 101.8 50.9 98.9 77.6 77.1 50.4 IPK00001369

327.5 443.3 532.1 405.8 91.3 58.6 104.9 68.9 99.2 62.4 79.1 51.2 IPK00001370

309.3 518.5 510.9 412.6 88.3 103.0 98.1 50.5 98.4 67.6 79.4 46.3 IPK00001371

358.8 377.4 544.3 476.5 102.9 97.5 105.2 86.3 99.4 68.4 92.2 51.6 IPK00001372

355.5 457.3 541.6 448.5 82.2 100.6 103.7 63.2 100.0 98.0 73.9 57.7 IPK00001536

146.5 168.0 286.0 331.0 38.1 36.1 −4.8 15.8 100.3 79.5 59.4 41.9 IPK00001600

93.0 300.3 265.4 278.8 −19.0 37.9 19.4 3.2 90.5 68.0 48.6 47.1 IPK00001605

192.0 282.0 148.9 206.8 67.9 43.4 0.8 −2.2 98.7 70.0 42.5 36.6 IPK00001865

218.0 256.4 218.3 256.6 23.1 39.2 14.0 28.0 99.9 99.0 54.0 36.4 IPK00001866

63.3 130.4 296.6 258.1 −26.8 16.7 0.4 8.6 100.6 99.6 72.0 39.3 IPK00001882

106.8 184.1 209.0 443.0 −57.3 4.1 17.6 42.7 99.3 67.6 41.9 41.1 IPK00001897

314.0 553.9 299.8 288.5 76.7 83.8 20.0 7.3 10.3 36.1 33.9 40.5 IPK00001984

402.0 610.5 329.0 287.9 88.8 94.6 2.2 7.8 −10.5 43.7 36.8 46.7 IPK00002187

405.0 609.0 403.4 305.3 90.2 96.5 29.8 15.4 2.7 41.9 42.9 49.1 IPK00002233

372.0 517.1 472.3 315.6 66.0 90.0 33.5 30.3 96.0 74.2 45.4 35.7 IPK00002443

203.8 205.0 349.0 352.1 5.8 59.1 58.3 50.4 75.8 67.7 40.1 34.7 IPK00002772

333.3 238.1 440.4 267.0 82.6 100.0 77.7 29.3 100.0 100.9 97.6 35.1 IPK00002774

366.0 435.8 478.8 268.5 87.2 96.9 83.3 −2.7 98.8 100.4 97.5 43.5 IPK00002777

378.0 322.3 315.3 218.1 89.1 86.3 47.7 −12.6 99.6 100.4 96.8 40.2 IPK00002778

332.0 499.4 543.5 366.0 79.6 96.3 99.3 33.0 98.8 78.2 97.5 71.7 IPK00002785

315.0 224.8 487.4 429.3 100.3 40.1 99.4 83.0 99.6 71.7 97.9 97.2 IPK00002791

410.8 325.6 434.1 295.3 89.0 46.1 98.5 14.2 99.3 75.0 97.6 65.8 IPK00002835

315.3 308.9 478.6 489.8 94.5 17.8 102.4 64.5 99.8 48.3 98.1 94.0 IPK00003316

283.0 303.9 573.9 296.1 81.9 92.3 69.6 5.0 43.4 61.3 42.0 34.1 IPK00003361

188.3 111.8 434.1 210.8 31.6 62.9 13.8 16.2 94.9 67.1 37.6 51.6 IPK00003556

226.0 524.3 313.1 247.1 83.3 89.0 18.8 9.1 71.9 65.6 39.6 41.5 IPK00003558

104.0 279.9 330.0 292.3 −51.3 2.8 34.4 5.1 87.2 65.3 46.4 45.1 IPK00003607

142.3 164.4 293.9 267.4 27.7 59.5 32.0 17.2 96.4 70.6 47.9 42.3 IPK00004014

95.5 330.0 262.3 321.4 −38.6 18.1 15.6 20.4 97.7 68.4 46.8 38.7 IPK00004145

324.5 243.8 527.9 437.4 88.6 87.2 103.2 56.7 44.7 100.5 47.4 38.4 IPK00004146

320.0 347.1 542.6 386.9 81.2 93.3 101.2 41.8 98.3 57.9 81.4 41.1 IPK00004147

362.8 345.8 516.1 479.8 102.4 95.5 101.8 74.5 91.8 99.5 82.3 43.8 IPK00004148

315.3 347.6 508.4 414.6 84.5 88.4 97.5 55.9 96.4 38.6 84.5 43.7 IPK00004149

336.5 338.1 535.4 394.6 83.8 94.5 102.3 56.4 98.9 39.4 85.5 44.4 IPK00004150

296.3 315.9 515.5 396.3 81.6 90.8 102.2 66.3 99.2 77.7 94.3 52.0 IPK00004151

351.3 350.6 505.6 368.0 89.0 94.0 102.9 55.1 98.4 70.9 85.2 40.8 IPK00004152

262.5 362.8 523.5 451.8 75.6 93.7 103.2 89.7 99.0 56.0 93.0 53.1 IPK00004153

426.8 431.1 523.3 197.8 100.2 97.0 98.1 18.8 96.9 44.4 82.2 15.1 IPK00004207

198.0 596.4 616.9 259.4 34.7 107.1 104.0 12.4 93.4 98.0 96.5 70.8 IPK00004230

193.8 376.8 658.0 384.8 73.7 95.9 75.2 11.0 85.2 95.8 62.9 39.1 IPK00004272

152.0 199.9 96.1 227.8 11.9 57.6 −1.9 2.5 82.5 67.7 43.7 39.6 IPK00004277

367.0 425.5 255.3 352.6 104.9 48.9 7.7 22.4 99.2 67.1 51.3 33.5 IPK00004278

194.5 341.9 311.5 322.6 73.9 91.7 33.0 25.8 98.7 67.1 56.4 42.9 IPK00004293

321.8 451.8 532.9 387.9 108.6 105.5 105.1 49.3 96.6 98.5 76.0 44.3 IPK00004295

143.5 433.9 494.6 493.0 64.7 98.8 106.0 70.4 96.6 53.1 82.0 42.2 IPK00004296

216.3 477.0 472.5 491.4 84.3 105.4 101.1 77.4 94.3 97.2 83.3 43.3 IPK00004297

307.8 483.0 502.4 312.9 99.7 103.4 99.2 19.2 97.0 98.8 73.9 40.1 IPK00004298

350.0 554.9 494.5 279.6 102.3 105.4 95.3 19.0 30.3 82.9 48.5 31.8 IPK00004299

364.0 488.3 567.3 378.4 102.7 106.3 104.1 43.4 97.9 97.1 79.3 51.8 IPK00004300

333.3 413.1 537.9 371.0 104.4 101.8 101.4 37.5 98.3 98.6 70.6 51.0 IPK00004301

287.8 448.5 584.3 385.1 86.6 102.6 103.6 56.3 98.6 98.8 74.2 47.4 IPK00004302

229.5 422.1 483.0 476.3 81.1 99.8 98.7 71.3 98.4 98.2 82.6 48.4 IPK00004305

228.8 494.4 502.8 469.0 97.1 103.8 101.6 80.2 99.4 98.8 94.4 51.4 IPK00004306

200.3 436.0 520.1 213.5 81.4 98.0 98.1 −0.4 99.8 98.5 75.2 38.5 IPK00004307

303.5 416.6 541.6 392.0 104.3 98.6 102.5 68.4 99.7 98.9 79.2 44.8 IPK00004308

255.5 367.6 486.8 397.6 87.3 95.1 102.7 72.9 77.2 63.9 63.5 39.8 IPK00004309

258.5 459.3 516.8 420.0 95.8 102.4 100.5 59.3 99.5 98.4 80.1 49.1 IPK00004310

176.8 441.6 509.8 367.0 14.3 98.3 92.7 28.5 98.7 66.9 73.1 46.5 IPK00004311

366.0 514.6 532.3 350.4 104.4 104.5 99.5 40.3 97.5 70.9 76.7 43.5 IPK00004312

195.0 406.3 500.3 432.0 69.9 100.0 104.6 56.5 98.5 69.8 84.5 48.9 IPK00004313

177.8 468.8 469.0 269.9 49.2 104.2 101.6 17.8 98.7 98.5 75.0 48.9 IPK00004326

347.3 430.3 523.3 413.6 109.4 102.1 102.2 72.4 99.5 98.6 89.6 52.7 IPK00004327

125.8 438.6 549.8 459.1 47.6 102.0 105.2 87.8 99.2 98.8 86.3 67.0 IPK00004328

326.5 408.3 482.8 332.6 94.9 95.9 87.1 11.2 12.2 69.7 38.8 43.0 IPK00004329

415.5 454.4 567.1 489.3 111.0 100.2 105.2 71.9 98.3 98.6 76.8 51.3 IPK00004330

305.0 503.3 575.8 251.1 107.2 102.5 100.8 −5.6 98.0 97.9 69.7 32.8 IPK00004331

334.0 442.5 526.9 321.1 94.6 100.4 101.5 43.8 98.7 52.7 69.8 24.0 IPK00004332

164.0 452.4 425.4 481.6 60.5 102.5 94.5 72.0 98.9 99.1 78.1 37.0 IPK00004333

270.8 522.8 515.1 362.8 83.0 104.4 94.5 31.3 98.4 98.8 59.3 34.8 IPK00004335

245.5 461.5 484.3 335.4 104.0 100.9 94.4 31.6 96.1 67.1 75.7 39.9 IPK00004362

393.8 523.9 561.9 502.1 98.2 104.5 98.8 63.7 99.4 98.3 71.0 42.9 IPK00004383

89.0 252.3 303.8 296.4 −80.9 31.3 17.1 22.6 99.7 99.2 50.6 34.2 IPK00004420

135.0 219.0 278.5 303.0 −67.5 30.7 6.3 24.5 99.6 98.5 52.4 40.3 IPK00004441

126.8 307.0 377.5 260.0 −120.3 29.9 34.0 18.0 98.6 84.0 41.4 37.1 IPK00004501

145.0 273.8 328.5 305.8 −9.3 30.6 24.3 19.3 99.3 66.8 57.6 41.3 IPK00004678

193.3 284.4 388.9 335.3 73.3 88.9 36.5 13.9 100.8 99.1 65.2 36.5 IPK00004680

238.8 389.1 277.8 353.3 76.9 64.6 3.1 38.6 99.2 73.5 41.8 44.4 IPK00004683

204.0 379.6 437.5 355.0 75.8 61.7 91.7 37.2 100.1 69.6 97.1 44.3 IPK00004686

129.3 285.6 305.0 300.1 26.6 40.8 15.0 17.3 100.2 70.3 41.2 38.3 IPK00004687

239.0 343.3 411.1 328.6 74.4 56.3 61.3 14.4 99.2 62.5 70.4 44.2 IPK00004692

303.5 309.6 325.4 304.1 90.2 93.4 8.1 31.2 17.0 53.1 38.4 42.2 IPK00004706

290.8 440.0 365.8 300.0 57.3 69.9 17.6 35.0 97.4 76.4 41.9 41.1 IPK00004715

281.8 432.3 482.3 298.0 69.7 85.8 61.1 13.3 99.3 97.7 36.4 36.8 IPK00004716

280.5 309.1 549.8 297.5 69.4 85.1 77.9 6.0 100.4 98.3 39.0 32.0 IPK00004717

152.3 196.3 536.1 328.1 57.6 88.5 69.7 46.5 99.3 98.6 36.5 37.7 IPK00004849

253.8 281.3 457.3 354.8 84.5 92.9 41.7 25.8 32.6 57.7 34.3 40.3 IPK00004871

56.5 98.1 331.5 255.1 62.1 70.0 22.6 4.5 85.2 72.7 44.3 39.8 IPK00004899

217.8 211.4 494.5 311.4 76.8 73.5 40.3 8.6 84.7 72.0 36.4 43.6 IPK00004900

108.0 212.4 503.6 349.5 32.1 74.2 72.2 24.4 86.2 73.9 38.7 48.1 IPK00004903

205.3 481.3 525.4 370.8 62.6 48.6 56.0 23.4 94.5 69.1 43.7 41.3 IPK00004920

155.5 157.0 405.8 296.1 71.5 88.6 54.8 36.9 28.3 27.0 31.5 36.0 IPK00005250

44.0 117.6 289.6 339.1 45.0 76.4 10.8 33.8 101.0 70.4 28.8 30.9 IPK00005275

48.8 290.3 265.9 256.8 −77.4 10.1 13.3 14.7 85.6 66.9 43.8 43.3 IPK00005778

177.0 292.4 203.8 252.1 −10.9 35.5 12.6 4.5 93.9 86.2 39.0 43.7 IPK00005792

165.3 197.4 225.8 237.3 −30.7 27.2 23.0 26.2 89.8 81.6 29.1 33.5 IPK00005820

344.8 278.0 458.8 295.1 98.1 44.3 66.6 13.3 55.8 68.0 57.9 42.5 IPK00005821

452.5 453.1 525.3 341.6 90.9 56.0 75.7 24.8 52.3 41.2 54.6 47.6 IPK00005829

75.5 224.8 432.0 499.8 63.0 31.5 103.7 77.6 99.2 47.5 93.4 52.2 IPK00005830

315.8 435.3 483.4 325.6 95.5 70.8 98.3 21.0 84.5 48.8 72.8 47.0 IPK00006324

188.3 183.6 232.5 327.4 49.6 68.7 16.7 17.4 96.2 74.8 38.1 37.1 IPK00006503

197.8 172.1 227.0 299.3 68.2 73.2 1.1 14.7 −16.3 38.1 35.2 29.1 IPK00006751

142.3 164.5 301.5 367.1 75.2 73.2 17.9 11.0 37.4 59.5 39.9 39.0 IPK00006760

164.3 278.3 179.1 326.4 63.4 46.6 25.8 17.7 99.7 65.3 46.4 40.8 IPK00006761

182.0 478.4 340.5 305.0 84.3 68.5 29.2 14.3 99.3 70.6 44.5 39.6 IPK00006887

156.8 183.6 221.4 295.9 73.1 71.4 −12.0 −0.6 92.9 79.3 31.0 38.1 IPK00007311

147.8 224.4 168.9 256.1 49.1 56.1 −10.5 6.4 84.0 67.2 33.5 42.2 IPK00007329

230.5 193.1 551.9 315.5 78.6 86.6 55.1 1.3 94.1 74.9 73.9 50.0 IPK00007368

202.3 242.6 557.3 378.6 88.2 92.6 74.7 16.9 94.9 73.4 69.2 53.5 IPK00007369

246.5 465.9 375.5 335.9 87.0 32.3 14.0 21.8 80.9 72.9 44.3 37.2 IPK00007370

234.0 539.8 523.0 348.3 88.6 103.0 56.7 17.8 96.3 74.9 68.1 49.8 IPK00007371

218.3 534.3 467.8 244.5 87.5 65.2 29.8 −4.5 8.3 45.3 59.6 44.5 IPK00007722

84.5 253.9 380.5 314.1 −33.0 46.6 33.3 35.6 95.4 68.6 45.7 45.0 IPK00007830

388.3 540.5 495.6 250.6 108.5 105.0 97.0 8.2 96.6 69.7 62.0 39.2 IPK00007853

386.0 523.3 489.9 298.6 84.0 106.6 95.6 17.6 98.3 68.4 73.8 39.3 IPK00007886

462.0 583.0 531.4 373.4 96.9 107.5 88.3 32.7 98.5 68.0 74.5 37.9 IPK00007913

294.0 528.5 493.6 217.9 69.6 101.6 97.8 8.4 97.0 97.8 68.5 36.6 IPK00007915

383.3 470.9 477.4 274.6 82.4 97.9 90.5 13.4 97.1 98.6 72.6 41.5 IPK00007988

181.8 368.8 289.8 254.3 −69.2 28.1 7.5 0.9 92.2 88.3 34.9 39.3 IPK00008001

409.8 469.1 387.1 360.5 14.3 56.6 27.4 20.1 96.1 70.4 47.4 39.5 IPK00008024

188.8 321.0 492.1 323.8 0.2 23.0 67.6 13.0 99.5 73.0 62.4 45.3 IPK00008036

79.8 251.4 559.6 514.4 −91.1 26.0 75.8 70.0 98.9 71.9 68.7 59.7 IPK00008037

110.8 393.6 491.4 377.0 −44.0 36.0 62.1 55.4 99.6 78.6 80.6 63.1 IPK00008038

307.5 371.6 337.3 264.9 21.0 3.4 32.1 13.3 98.2 73.8 58.7 52.3 IPK00008039

99.0 377.1 591.3 418.3 38.3 9.2 73.0 51.8 96.3 68.2 66.6 54.7 IPK00008069

123.5 328.0 358.9 289.4 −42.5 16.5 37.6 27.5 99.1 71.8 47.6 46.9 IPK00008081

363.3 482.0 559.0 405.8 94.7 99.5 104.9 66.3 55.0 69.5 48.4 50.8 IPK00008389

38.8 268.3 255.5 217.4 73.5 59.1 19.5 2.6 98.7 72.9 48.1 46.3 IPK00008599

67.3 261.3 322.0 267.5 37.1 49.5 4.5 2.2 84.3 72.0 47.7 49.5 IPK00009117

191.5 276.8 254.8 319.9 75.6 75.7 35.4 50.6 −11.9 22.4 38.8 42.6 IPK00009149

110.5 228.6 265.4 388.5 90.5 95.1 9.3 30.6 94.1 65.5 33.4 37.3 IPK00009438

126.3 367.8 286.9 271.6 46.0 6.0 13.6 −9.3 97.2 68.6 54.6 41.3 IPK00009507

388.3 551.8 348.6 377.4 70.9 75.8 8.0 19.2 −3.7 39.6 46.1 45.0 IPK00010207

116.0 124.8 516.3 476.1 94.7 84.7 99.5 79.6 99.2 100.1 84.3 77.4 IPK00010236

193.3 194.8 224.0 291.8 65.6 66.5 4.4 13.2 −1.6 16.8 32.7 36.3 IPK00010252

179.8 175.9 145.9 219.5 70.4 68.1 −7.0 12.6 18.3 19.1 40.8 36.7 IPK00010328

134.3 164.6 419.5 263.8 71.1 71.3 49.5 11.6 5.0 48.2 47.6 39.8 IPK00010376

47.8 122.4 109.5 143.1 85.7 74.5 −1.7 −13.2 45.6 50.2 50.0 39.0 IPK00010378

263.5 409.1 244.8 236.5 94.6 98.0 3.5 −3.9 90.8 94.0 34.8 31.6 IPK00010407

243.5 222.5 575.9 330.4 82.3 80.2 65.1 37.5 35.1 58.0 45.1 42.5 IPK00010411

203.8 370.3 278.4 240.4 89.7 83.3 19.9 10.2 36.1 52.8 42.4 26.9 IPK00010413

115.8 446.5 313.3 260.6 68.8 89.6 25.2 10.1 3.7 37.9 29.0 44.7 IPK00010420

29.5 81.9 153.1 230.0 65.2 34.6 −2.9 5.3 67.1 90.6 56.2 40.4 IPK00010467

183.0 211.4 332.9 283.1 33.8 73.7 16.1 11.9 67.7 86.2 34.2 36.4 IPK00010519

374.3 425.6 566.4 521.1 98.7 105.8 104.1 88.5 98.7 66.4 93.6 70.3 IPK00105020

316.5 397.9 547.6 482.3 97.1 96.4 103.8 83.8 99.6 66.0 96.0 66.6 IPK00010547

125.8 172.4 468.0 270.4 60.1 50.7 68.1 13.0 75.5 95.5 54.7 47.3 IPK00010555

181.3 538.8 402.4 272.8 89.3 91.5 55.5 13.0 29.2 62.2 35.1 18.8 IPK00010556

225.0 169.6 442.0 371.5 65.7 86.9 79.9 28.0 36.1 68.0 39.5 36.4 IPK00010570

315.5 573.6 226.4 237.8 61.2 84.6 4.7 16.8 70.7 80.7 53.8 41.8 IPK00010630

146.5 171.3 409.1 233.5 65.7 67.2 28.5 9.3 19.1 61.2 36.4 17.1 IPK00010790

494.3 577.5 498.0 339.3 79.3 89.6 52.8 23.7 7.0 42.6 39.6 37.4 IPK00010827

171.0 369.9 332.0 321.6 54.7 44.1 19.0 14.1 95.0 71.0 47.6 49.0 IPK00010878

200.3 287.6 400.0 339.8 78.8 68.8 38.3 28.2 20.9 43.1 39.2 38.4 IPK00010900

87.8 171.8 348.5 312.4 −7.8 8.2 23.8 15.6 98.4 72.2 55.2 47.6 IPK00010999

183.0 170.0 174.3 332.1 8.5 28.1 20.3 22.6 101.3 99.5 90.5 29.6 IPK00011016

179.5 204.9 224.6 288.0 59.0 86.0 6.0 8.1 99.4 96.3 36.7 44.2 IPK00011017

155.5 173.4 221.5 292.3 55.6 71.6 12.9 23.9 92.6 97.3 47.2 44.1 IPK00011079

462.3 459.5 260.1 337.0 72.9 83.4 22.8 44.6 19.7 49.5 32.4 34.0 IPK00011267

250.8 383.9 356.4 188.8 −36.5 32.6 27.6 8.2 91.3 68.9 59.6 43.8 IPK00011280

152.0 183.0 189.0 279.9 41.1 55.6 10.7 7.7 98.3 72.1 32.5 35.9 IPK00011305

162.0 107.9 309.0 264.5 55.4 56.4 31.6 10.0 74.9 67.9 45.3 41.6 IPK00011377

319.8 523.4 437.4 319.8 60.9 74.3 48.4 26.6 66.7 82.9 59.5 45.0 IPK00011401

163.5 236.9 198.4 233.3 3.2 −1.5 7.3 18.3 73.9 71.1 51.4 53.6 IPK00011705

656.5 578.0 540.9 503.5 79.8 80.5 45.4 49.9 12.9 46.3 44.5 39.6 IPK00011714

546.0 548.6 349.0 329.5 69.1 66.5 15.6 11.2 100.8 98.6 82.8 33.9 IPK00012262

131.5 92.6 328.4 254.9 62.8 65.1 26.2 13.0 90.7 67.9 37.7 26.4 IPK00012302

411.8 347.8 427.0 270.5 76.8 78.2 45.3 24.6 23.9 32.0 38.2 42.1 IPK00012303

540.8 467.6 319.6 234.1 78.3 72.1 12.0 −8.6 21.2 34.7 35.8 36.5 IPK00012330

296.8 390.9 495.6 263.1 77.2 64.1 72.5 22.6 20.9 37.0 36.6 38.0 IPK00012390

205.0 226.5 374.3 230.8 73.1 87.7 26.7 −6.0 35.1 49.4 43.2 40.5 IPK00012392

135.8 127.8 409.8 277.3 45.3 15.4 32.3 12.0 96.4 77.0 46.7 31.5 IPK00012443

168.3 110.6 305.5 279.0 35.6 64.7 26.2 15.5 96.6 66.0 42.2 44.0 IPK00012454

503.3 591.0 268.3 320.1 75.5 75.0 16.4 21.3 22.7 38.9 37.0 34.8 IPK00012464

501.5 421.5 343.1 256.5 79.9 78.2 54.7 22.6 −0.6 25.1 31.1 33.9 IPK00012465

490.8 577.0 416.9 267.0 77.1 94.3 45.0 7.2 5.2 38.6 38.6 36.9 IPK00012508

261.5 254.5 476.3 388.9 72.8 65.1 46.9 28.2 74.4 65.1 32.8 36.9 IPK00012515

233.8 153.1 186.4 237.5 87.1 88.7 4.0 4.4 95.2 55.2 40.3 40.9 IPK00012522

265.5 254.5 194.1 274.0 75.4 82.0 −11.9 3.1 81.0 73.2 40.0 38.5 IPK00012561

55.5 112.0 293.5 280.8 44.1 85.8 15.7 2.8 89.0 25.3 26.3 31.2 IPK00012633

123.3 86.8 126.8 270.9 80.7 73.4 12.5 24.9 98.7 99.6 66.8 41.4 IPK00012673

524.3 271.6 149.0 225.6 85.7 60.8 5.7 3.3 78.1 76.0 55.4 35.5 IPK00012837

519.8 402.6 312.4 274.4 43.8 26.5 8.4 6.5 90.9 71.8 95.9 90.6 IPK00012972

479.5 540.9 272.3 289.8 61.8 75.4 16.8 14.1 98.1 69.4 44.9 46.3 IPK00012991

436.3 477.9 426.5 372.0 −36.0 38.2 25.4 25.1 69.3 74.8 51.4 52.1 IPK00013026

476.8 385.9 270.4 340.1 66.3 29.9 14.5 17.8 100.0 70.1 79.7 53.0 IPK00013054

539.5 507.4 515.3 384.9 66.7 65.8 45.8 25.3 34.8 45.1 56.7 46.5 IPK00013302

194.8 255.4 472.4 360.5 −44.8 37.2 27.6 18.1 90.2 68.1 49.0 35.7 IPK00013346

473.3 534.5 397.5 243.9 69.6 94.4 45.3 22.5 40.1 57.0 38.3 40.2 IPK00013450

560.0 526.9 490.5 255.9 99.7 100.7 70.4 0.1 95.1 64.5 71.7 34.1 IPK00013451

415.5 559.0 545.1 423.9 90.2 101.5 66.7 34.9 84.3 48.7 56.3 51.4 IPK00013462

207.8 406.9 296.6 308.6 −56.1 25.5 11.5 13.0 89.8 68.6 44.8 46.8 IPK00013463

275.3 294.1 416.9 316.6 −18.3 12.6 23.9 33.9 94.1 67.3 54.0 49.9 IPK00013528

337.5 255.6 223.4 219.5 53.3 26.6 17.5 2.9 99.0 73.2 56.9 46.4 IPK00013812

480.8 501.4 420.9 343.8 96.8 104.7 92.8 16.4 98.8 67.5 90.8 37.7 IPK00013840

569.8 575.8 285.0 230.3 75.0 86.4 35.4 2.8 −1.0 52.4 47.7 44.6 IPK00013843

514.0 521.3 361.5 276.6 76.3 78.9 25.3 6.6 16.0 47.9 22.9 48.3 IPK00013917

199.8 195.3 414.0 411.5 72.9 65.8 38.1 40.8 33.8 70.4 54.4 52.3 IPK00014081

208.5 384.4 460.8 276.8 94.6 91.8 51.8 11.0 12.0 37.9 35.4 35.4 IPK00014087

269.5 421.0 551.0 245.0 92.2 91.1 71.8 5.9 17.0 41.7 41.3 30.4 IPK00014108

529.8 625.5 270.9 200.4 67.5 84.0 11.7 4.6 13.8 34.5 47.8 41.3 IPK00014158

191.5 167.0 239.1 184.0 58.2 59.2 −2.2 −14.1 92.7 95.9 45.3 42.9 IPK00014161

308.3 337.6 378.3 225.5 4.2 50.8 23.0 10.3 87.4 83.4 46.7 45.5 IPK00014217

635.8 581.1 361.8 340.4 84.3 82.3 18.5 28.7 14.6 54.3 35.1 42.9 IPK00014218

167.8 132.6 372.4 234.3 73.2 79.4 20.6 0.5 −1.3 38.3 39.8 39.4 IPK00014345

581.8 625.4 467.4 282.6 81.2 83.5 60.3 14.4 11.5 72.5 50.0 38.3 IPK00014422

262.5 377.4 452.9 318.4 −9.8 30.0 38.5 16.6 72.1 82.4 38.7 35.9 IPK00014691

167.5 132.9 201.1 229.5 57.0 70.0 57.2 4.4 99.5 100.7 40.9 40.7 IPK00014698

101.3 167.8 283.5 264.0 55.8 26.5 26.2 −2.8 100.3 70.3 35.1 37.6 IPK00014717

81.0 177.6 186.5 330.8 11.9 40.8 47.2 22.9 98.7 74.3 40.4 45.1 IPK00014754

45.3 388.4 316.0 364.1 −10.9 10.1 13.0 26.0 92.6 66.8 48.9 42.9 IPK00014798

67.5 82.4 375.9 250.9 6.3 72.3 40.7 15.4 99.3 98.1 37.2 39.9 IPK00014804

48.0 63.8 313.4 317.6 21.8 59.3 26.8 17.7 98.0 67.6 46.8 48.9 IPK00014811

333.0 577.0 347.5 341.8 65.4 86.6 25.3 31.9 14.0 36.6 43.7 49.4 IPK00014844

58.8 364.3 268.6 264.9 −15.1 8.2 14.9 11.0 98.4 67.1 43.4 41.7 IPK00014864

379.3 516.6 427.3 261.9 72.5 71.4 40.3 3.7 29.2 42.0 35.3 46.5 IPK00014865

47.8 73.8 338.0 247.8 41.2 29.1 17.1 6.4 99.1 65.1 43.4 43.1 IPK00014902

97.0 406.3 130.0 250.3 23.5 19.1 49.7 13.5 99.1 66.8 69.8 45.8 IPK00014944

259.5 465.9 298.1 200.1 57.6 47.1 21.2 −10.4 100.0 70.4 43.0 27.1 IPK00014978

36.0 328.1 331.9 289.0 15.2 3.6 12.3 9.6 99.6 74.4 56.2 49.9 IPK00015041

373.8 539.6 366.1 285.3 78.3 83.3 24.2 5.2 31.8 44.6 46.3 35.9 IPK00015048

61.0 333.6 209.5 349.3 −96.3 16.1 −2.3 26.4 95.6 69.8 46.4 52.3 IPK00015085

416.3 397.3 299.6 230.3 72.3 72.2 33.8 5.1 23.0 93.2 58.8 40.4 IPK00015536

183.8 182.1 201.4 232.0 67.8 74.0 43.7 −8.6 88.3 68.3 29.0 33.2 IPK00015751

321.3 227.9 377.4 393.8 96.0 46.2 100.9 39.7 99.3 47.4 82.2 47.2 IPK00015755

108.3 277.0 278.0 396.4 22.0 19.9 77.5 39.0 97.6 77.0 55.2 45.1 IPK00015849

96.0 266.6 168.3 248.6 −3.0 4.8 −0.8 8.4 66.6 69.1 44.3 43.2 IPK00016045

436.3 371.4 285.5 296.5 66.0 70.7 43.2 31.7 17.6 25.1 30.9 45.0 IPK00016132

100.3 65.1 194.0 245.4 −37.9 17.8 25.1 9.4 99.1 63.7 95.8 52.1 IPK00016327

534.3 263.4 474.9 393.4 69.5 17.9 71.8 33.5 86.4 45.6 55.6 47.7 IPK00016351

447.5 377.5 491.4 335.8 89.4 50.0 82.7 40.8 92.9 68.6 57.2 52.8 IPK00016352

446.5 473.3 447.6 428.4 86.2 70.7 61.4 43.7 83.0 64.6 46.4 44.3 IPK00016362

246.5 599.8 485.8 451.9 81.3 107.2 59.4 49.8 95.9 68.1 54.8 47.8 IPK00016364

486.3 576.1 394.9 302.8 74.9 74.2 26.7 14.7 20.8 63.3 47.4 49.9 IPK00016367

517.5 481.6 520.1 340.0 68.1 99.5 70.7 27.4 76.2 65.3 44.7 47.9 IPK00016393

74.0 123.6 249.4 339.0 66.7 89.9 36.3 45.5 30.4 50.1 34.2 31.3 IPK00016452

202.3 171.8 204.8 286.8 64.7 80.0 −2.2 0.1 91.8 86.8 36.5 38.7 IPK00016754

60.3 117.3 184.8 248.0 19.5 16.5 27.7 23.2 74.3 98.3 34.3 33.3 IPK00016810

106.5 185.3 137.1 294.4 38.0 65.6 17.9 8.2 100.2 54.4 38.1 43.5 IPK00016831

178.8 254.9 159.9 256.1 83.9 78.1 20.6 15.7 15.9 29.3 38.8 32.3 IPK00016832

167.5 254.9 352.9 312.6 75.7 81.9 37.2 18.3 50.5 29.5 31.5 35.6 IPK00016930

220.0 291.1 313.0 269.3 56.2 73.7 12.4 8.8 99.3 99.4 62.8 42.8 IPK00016942

106.0 218.3 410.4 361.9 −64.0 76.9 32.9 8.5 95.2 45.0 44.0 44.8 IPK00016968

97.8 114.9 183.8 289.1 −5.0 −5.3 −5.9 16.8 99.1 65.3 43.9 45.5 IPK00016976

62.0 137.6 188.0 301.6 −71.9 16.7 2.1 16.4 99.6 100.3 31.4 30.7 IPK00016986

119.3 174.4 191.5 359.9 0.5 13.0 14.4 31.1 100.9 100.3 43.7 34.8 IPK00016996

64.8 140.4 134.5 193.4 −50.2 14.7 27.5 17.0 103.8 100.6 68.8 34.4 IPK00017027

59.0 118.9 319.5 499.9 −72.4 18.9 8.1 46.9 80.7 76.3 34.0 33.5 IPK00017033

143.0 353.9 525.0 501.1 49.5 96.3 102.5 92.7 103.5 100.2 97.4 75.7 IPK00017072

67.0 72.1 321.0 275.8 −29.5 −21.3 27.0 17.4 76.0 82.7 30.3 5.9 IPK00017127

283.3 176.9 201.4 276.8 95.2 95.2 −1.5 9.0 99.2 82.5 59.9 40.9 IPK00017146

55.0 108.5 82.0 236.5 24.3 72.1 0.9 11.0 100.0 59.5 73.5 39.6 IPK00017184

30.0 93.9 129.5 298.4 −79.6 13.3 29.4 16.9 99.0 98.8 46.1 31.0 IPK00017234

40.8 69.5 158.4 298.4 −82.4 12.5 18.2 7.7 98.2 69.9 45.1 37.8 IPK00017235

104.3 185.4 470.5 345.6 0.9 59.9 55.2 28.5 101.4 81.2 53.6 41.1 IPK00017254

92.0 221.3 190.0 226.6 4.1 40.4 14.5 11.4 82.1 92.0 40.3 36.2 IPK00017306

54.3 314.4 224.9 308.4 44.0 15.8 9.2 26.9 74.8 73.6 58.5 44.2 IPK00017345

113.0 304.0 305.5 292.8 14.9 19.2 25.3 24.8 103.7 71.5 72.0 46.7 IPK00017527

44.3 177.0 131.8 302.8 −69.7 25.8 −3.3 25.1 95.8 70.7 46.5 39.9 IPK00017824

111.8 140.4 158.6 199.5 −26.4 −4.1 6.9 1.3 74.0 97.0 37.9 34.0 IPK00017905

124.3 190.0 194.5 352.4 −31.7 16.6 30.0 27.5 101.0 100.6 81.6 24.9 IPK00017949

187.0 257.9 163.8 300.4 65.7 78.5 −8.9 17.6 16.2 54.5 44.4 48.0 IPK00018011

447.8 451.5 309.9 309.1 68.2 69.7 26.0 9.7 14.8 28.9 40.6 44.8 IPK00018016

217.0 234.4 323.8 332.3 46.1 69.8 12.6 13.5 93.8 68.9 41.3 43.5 IPK00018017

199.3 229.5 377.5 265.0 63.2 34.5 20.2 8.6 93.8 72.0 29.6 50.6 IPK00018076

467.8 565.3 289.9 347.6 70.6 92.1 37.5 43.8 90.0 63.8 40.8 32.9 IPK00018456

256.3 215.1 391.5 342.5 85.1 72.7 45.0 34.4 63.3 67.3 46.9 46.5 IPK00019245

219.8 386.4 376.8 334.0 88.8 65.4 22.0 16.2 −9.0 42.7 43.3 42.7 IPK00019259

470.5 551.3 344.4 246.3 65.3 81.1 30.1 10.8 −8.7 41.9 31.7 42.7 IPK00019376

355.5 420.4 497.1 520.4 81.4 97.4 100.4 91.9 98.6 68.4 85.6 63.9 IPK00019599

305.0 488.8 537.1 477.8 79.1 69.5 105.7 96.1 98.8 74.2 97.1 70.8 IPK00019853

129.5 217.9 192.3 210.1 58.5 41.9 10.2 1.8 97.3 66.2 29.5 34.9 IPK00019854

153.0 189.3 394.4 309.5 38.6 77.9 27.3 20.3 88.8 55.5 44.6 31.6 IPK00019856

131.5 278.1 272.5 276.0 15.1 64.7 28.7 21.2 95.9 68.3 39.0 34.3 IPK00019970

227.5 256.5 301.6 345.8 70.5 69.6 11.2 23.0 −8.2 39.8 43.5 49.3 IPK00020016

265.0 430.5 238.4 235.3 73.3 76.8 2.7 1.6 −16.9 50.3 42.3 40.2 IPK00020047

146.0 309.6 294.9 370.5 6.3 19.1 3.5 15.8 90.3 95.0 58.9 37.1 IPK00020208

283.0 279.9 354.1 396.1 65.7 67.4 18.1 23.7 4.6 28.7 38.5 39.4 IPK00020522

280.0 319.8 414.0 313.6 85.1 69.7 33.2 6.2 38.2 47.4 50.0 45.5 IPK00020542

205.3 314.8 430.8 330.6 71.5 69.3 58.7 19.9 44.7 47.0 65.1 51.8 IPK00020853

166.8 232.5 319.1 275.9 71.6 23.3 65.1 −4.0 46.0 56.4 57.3 44.0 IPK00021074

191.8 304.9 425.6 344.3 76.4 20.2 88.9 32.6 49.9 43.9 66.8 50.0 IPK00021079

273.8 255.0 350.9 353.6 77.2 28.7 71.5 25.1 43.5 48.6 58.2 49.2 IPK00021083

200.8 190.5 320.4 213.9 70.4 48.2 71.4 −5.0 49.8 52.8 62.8 50.6 IPK00021926

548.0 218.4 476.1 435.6 91.1 51.4 98.6 63.8 98.6 46.0 84.5 45.3 IPK00021927

586.3 384.6 513.9 443.3 96.9 57.4 104.8 78.1 98.7 70.3 85.0 47.6 IPK00021928

623.3 240.8 480.5 433.8 106.5 46.2 98.1 57.6 98.0 40.9 83.1 42.4 IPK00021929

623.5 423.8 502.5 221.3 107.4 67.6 95.1 18.5 99.3 32.9 84.5 46.5 IPK00021930

700.8 300.0 564.3 356.9 103.5 93.0 101.1 13.0 99.5 99.7 82.9 44.9 IPK00022200

148.3 279.5 218.5 282.6 74.4 86.2 29.9 3.6 82.3 19.7 26.8 30.8 IPK00022204

181.3 124.9 210.8 261.9 65.4 85.8 69.0 40.1 54.9 78.1 21.1 30.0 IPK00022232

124.8 114.3 227.8 294.8 16.2 63.2 53.1 14.4 102.4 96.7 47.9 40.7 IPK00022459

60.3 95.1 248.2 333.3 72.9 86.2 41.8 14.9 30.0 31.5 37.7 45.7 IPK00022846

492.8 261.5 431.4 376.6 22.5 37.8 67.1 38.9 97.5 41.0 47.1 25.0 IPK00022950

488.0 322.5 352.8 412.9 60.1 83.6 21.6 24.6 99.6 28.1 39.7 36.6 IPK00022972

300.3 386.8 483.6 322.8 69.4 90.7 83.2 19.6 16.9 30.0 45.7 27.1 IPK00023002

223.5 277.6 453.1 388.4 −7.7 40.5 78.8 19.0 95.7 41.9 44.6 40.5 IPK00023461

156.8 207.9 209.1 292.6 −61.0 −1.6 −5.8 14.6 67.9 76.3 42.7 37.4 IPK00023509

91.8 251.8 346.0 276.6 46.2 36.4 32.6 3.9 98.8 45.4 70.1 22.4 IPK00023512

39.8 254.0 325.5 333.5 −67.9 26.9 31.9 34.9 99.4 71.1 48.7 40.9 IPK00023891

379.0 382.4 145.6 202.6 99.3 27.8 78.4 −6.0 96.7 70.1 43.2 28.6 IPK00024037

132.8 156.5 116.5 213.9 17.0 67.5 11.6 −10.9 104.1 76.2 37.9 30.6 IPK00024172

175.3 102.4 487.5 421.1 −43.3 28.0 67.1 53.6 100.4 97.2 92.6 68.9 IPK00024412

136.0 257.8 249.4 270.0 29.9 11.8 60.1 0.5 98.4 75.7 66.8 42.3 IPK00024744

584.0 332.8 158.6 174.5 89.1 97.1 17.5 12.3 −12.2 23.8 30.8 34.7 IPK00024871

150.8 256.0 486.9 334.6 79.5 79.0 73.4 21.5 99.2 41.6 70.4 40.5 IPK00024912

130.8 124.3 138.9 172.9 23.6 53.2 41.8 7.8 94.3 86.2 56.8 41.7 IPK00024914

404.3 211.3 407.6 332.9 45.0 68.6 41.9 21.0 96.3 37.4 40.3 43.3 IPK00024984

163.3 173.8 295.4 325.3 78.2 80.9 −4.9 21.4 86.0 64.6 46.3 45.8 IPK00025149

162.5 282.1 327.6 285.9 27.0 15.0 18.0 0.8 92.6 65.1 55.1 44.5 IPK00025180

321.0 322.1 217.8 294.5 25.5 38.2 9.2 3.9 77.6 69.2 64.3 48.0 IPK00025412

179.8 351.4 306.5 225.3 30.3 13.2 13.1 −11.6 90.9 66.4 43.8 43.0 IPK00025425

243.3 367.0 356.3 356.9 32.5 18.5 20.0 20.5 100.5 75.6 53.2 49.1 IPK00025546

192.3 279.6 499.5 408.3 25.0 53.1 54.7 32.6 96.3 68.7 64.7 31.8 IPK00025761

285.0 226.9 381.8 314.1 71.5 79.9 42.1 15.8 31.8 60.5 28.1 33.2 IPK00025807

142.3 174.8 380.6 240.9 49.9 72.7 26.2 9.4 98.4 47.9 36.8 37.0 IPK00025935

64.5 78.8 262.1 335.9 66.0 68.8 12.0 5.3 10.9 28.4 42.5 40.2 IPK00025978

115.8 194.3 271.1 292.8 4.9 58.8 11.0 14.9 91.4 83.6 25.0 30.2 IPK00026207

242.0 309.8 461.8 383.3 80.3 7.9 89.0 40.1 99.0 34.3 61.4 45.9 IPK00026239

93.3 273.3 164.5 349.1 2.1 29.5 48.7 20.4 98.5 75.4 60.0 43.8

TABLE 2 Scaffold Number of Scaffold Name Coding Compounds Scaffold Structure Isonicotinohydrazides I 69

Benzamides II 19

Thiazolhydrazides III 6

Hydrazinecarbothioamides IV 5

Furancarbohydrazides V 4

Thiophenes VI 3

Pyrazole-pyridines VII 2

Pyridopyrimidinone VIII 1

One hit compound IX 1

One hit compound X 1

One hit compound XI 1

One hit compound XII 1

One hit compound XIII 1

One hit compound XIV 1

One hit compound XV 1

One hit compound XVI 1

One hit compound XVII 1

One hit compound XVIII 1

One hit compound XIX 1

One hit compound XX 1

TABLE 3 Compound QIM (μM) QUM (μM)

  1 +++ +++

  2 ++ +++

  3 ++ +++

  4 ++ +++

  5 ++ +++

  6 ++ +++

  7 ++ +++

  8 +++ +++

  9 ++ +++

  10 ++ +++

  11 +++ +++

  12 +++ +++

  13 ++ +++

  14 ++ ++

  15 ++ +++

  16 + +

  17 + +

  18 + +

  19 + ++

  20 + +

  21 ++ +++

  22 ++ +++

  23 +++ +++

  24 +++ +++

  26 ++ +++

  27 +++ +++

  28 +++ +++

  29 +++ +++

  30 +++ +++

  31 +++ +++

  32 +++ +++

  33 ++ +++

  34 + +

  54 ++ +++

  56 + ++

  58 + +++

  59 ++ +++

  60 + +++

  61 + +++

  63 + ++

  64 ++ +++

  67 + +

  90 + +

  91 ++ +++

  92 + +++

  93 + ++

  94 ++ +++

  95 + ++

  96 ++ ++

  97 + +++

  98 + ++

  99 + ++

  100 + +++

  101 + ++

  103 ++ +++

  104 ++ +++

  105 +++ ++

  107 ++ +++

  108 ++ +++

  109 + +

  112 + ++

  114 + ++

  115 + ++

  116 + ++

  118 + ++

  119 + +++

  120 + +++

  121 + ++

  132 + ++

  133 ++ +++

  134 + ++

  135 + ++

  137 + +

  139 + +

  140 + +

  147 + +

  151 ++ +

  152 + +

  160 + +

  163 + +

  173 + +

  180 + +

  184 + +

  185 + ++

  193 + +

  195 + +

  199 + ++

  200 + +

  201 + +

  204 + +

  206 +++ +++

  207 +++ +++

  208 +++ +++

  209 +++ +++

  210 +++ +++

  211 + +++

  212 + +

  213 + +++

  214 + ++

  215 + +

  216 + +

  217 + +++

  218 + +

  219 + +

  220 ++ +++

  221 + +

  222 + +

  224 + +

  226 + +

  229 + +

  231 +++ +++

  232 +++ ++

  233 + +

  234 + +

  235 +++ +++

  236 ++ +++

  237 + +++

  238 + +

  239 + +

  240 ++ ++

  241 + +

  242 + +

  243 + +

  245 + ++

  246 + +

  247 + +++

  248 + +++

  249 + +

  250 + +

  251 + +

  252 + +

  253 + +

  254 + +

  255 + +

  256 + +

  257 +++ +++

  258 +++ +++

  259 ++ +++

  260 + ++

  261 +++ +++

  262 + +

  263 + +

  264 ++ +++

  265 +++ +++

  266 + +++

  267 +++ +++

  268 + ++

  269 ++ ++

  270 +++ +++

  271 + +++

  272 + +

  273 +++ +++

  274 + +++

  275 + +++

  276 + ++

  277 + ++

  278 +++ +++

  280 + +++

  281 + +++

  282 + +

  283 + +

  284 + +++

  285 + +++

  286 + +++

  290 + +

  291 + +

  292 + +

  293 + +

  294 + +

  295 ++ +++

  296 + +

  297 + +

  298 + +

  299 ++ +++

  300 ++ +++

  301 ++ +++ Activity range: +++ indicates <5 uM, ++ indicates between 5-20 uM, + indicates >20 uM

TABLE 4 Compounds 4 24 Cytotoxicity Host Cells Range of MTC₅₀ (μM) SK-N-SH-Brain >100 >100 HepG2-Hepatocytes >100 >100 MRC5-Lung >100 >100 BJ-Skin >100 >100 HEK293-Kidney >100 >100 Antibacterial activity & Specificity Range of MICs for Strains/Isolates Type Origin Number multiple strains (μM) Mycobacterium M. tuberculosis Drug Sensitive Tissue 1 0.38 0.31 clinical isolates¹ RIF^(R) Sputum 2 0.05 0.08 Tissue 2  0.02-0.05 0.08 INH^(R) RIF^(R) Strep^(R) Sputum 1 0.1 0.08 Tissue 3 0.05-0.1 0.04-0.08 XDR Sputum 5  0.02-0.05 0.04-0.08 Tissue 0 0.05-0.1 0.08 MDR Sputum 3 0.05-0.1 0.04-0.08 Tissue 5 0.05-0.1 0.04-0.08 M. tuberculosis H37Rv 0.6 0.6 laboratory strains H37Ra 1.2 1.3 Beijing 1237 0.3 0.1 M. bovis BCG BCG Tokyo 1.2 0.6 BCG Pasteur 1.2 1.2 M. smegmatis mc² 155 1.2 0.6 Gram-negative Acinetobacter baumannii, Escherichia coli, Enterobacter cloacae, E. aerogenes, >250 >250 Klebsiella oxytoca, Pseudomonas aeruginosa, Salmonella enteridis, Vibrio mimicus Gram-positive Staphylococcus aureus, S. epidermis, S. capitis, S. xylosus, Micrococcus >250 >250 luteus, Listeria innocua, Lactobacillus gallinarum, group G Streptococcus, Streptococcus agalactiae, S. pyogenes, Enterococcus faecalis, E. faecium, E. gallinarum, Bacillus pumilus Corynebacterium C. striatum 27 27 C. jeikeium 2.7 2.7 Fungi Candida albicans, C. glabrata, C. parapsilosis >250 >250 INH: Isoniazid, RIF: Rifampin, Strep: Streptomycin, ^(R)resistant. ¹The clinical isolates were isolated either from resected lung tissue or sputum specimen, which were collected from active tuberculosis in-patients from the National Masan Tuberculosis Hospital during October 2003 to March 2007.

TABLE 5 Compounds 133 Cytotoxicity Range of Host Cells MTC₅₀ (μM) SK-N-SH-Brain >100 HepG2-Hepatocytes >100 MRC5-Lung >100 BJ-Skin >100 HEK293-Kidney >100 Jurkat-T-cell >100 THP-1-Monocytes >100 Primary BMDM >100 Primary human macrophages >100 Antibacterial activity & Specificity Range of MICs for multiple Strains/Isolates Type Origin Number strains (μM) Mycobacterium M. tuberculosis Drug Sensitive Sputum 2 5->20 clinical isolates¹ Tissue 2 2.5-5   RIF^(R) Sputum 1 2.5 Tissue 1 1.2 INH^(R) RIF^(R) Strep^(R) Sputum 3 0.3-1.2 Tissue 1 1.2 XDR Sputum 4 0.6-2.5 Tissue 5 0.3-5   MDR Sputum 3 0.3-1.2 Tissue 1 1.2 M. tuberculosis H37Rv 2 laboratory strains H37Ra 2 BCG Pasteur-Tokyo 2 M. smegmatis mc² 155 >100 Gram-negative Acinetobacter baumannii, Escherichia coli, Enterobacter NE cloacae, E. aerogenes, Klebsiella oxytoca, Pseudomonas aeruginosa, Salmonella enteridis, Vibrio mimicus Gram-positive Staphylococcus aureus, S. epidermis, S. capitis, S. xylosus, NE Micrococcus luteus, Listeria innocua, Lactobacillus gallinarum, group G Streptococcus, Streptococcus agalactiae, S. pyogenes, Enterococcus faecalis, E. faecium, E. gallinarum, Bacillus pumilus Corynebacterium C. striatum NE C. jeikeium Fungi Candida albicans, C. glabrata, C. parapsilosis NE INH: Isoniazid, RIF: Rifampin, Strep: Streptomycin, ^(R)resistant. ¹The clinical isolates were isolated either from resected lung tissue or sputum specimen, which were collected from active tuberculosis in-patients from the National Masan Tuberculosis Hospital during October 2003 to March 2007. NE: No effect up to 100 μg/mL equivalent to 320 μM. The antimicrobial spectrum was performed on clinical isolates from CHU d'Angers, France.

TABLE 6 Concentration Bacteria inoculum (CFU) Frequency of Compound (μg/ml) 10⁵ 10⁶ 10⁷ 10⁸ resistance 4 0.2 — — 12 >100 1 × 10⁻⁶ 0.8 — — — <100 1.6 — — — <100 3.2 — — — 1 1 × 10⁻⁸ 24 0.2 — — 7 >100 7 × 10⁻⁷ 0.8 — — — <100 1.6 — — — >100 3.2 — — — 1 1 × 10⁻⁸ INH-control 10 ND ND 33 ND 3 × 10⁻⁶ Concentration Bacteria inoculum (CFU) Frequency of Compound (μg/ml) 10⁶ 10⁷ 10⁸ resistance 264 0.4 — 37 306 3.4 × 10⁻⁶   0.8 — 5 117 8 × 10⁻⁶ 1.6 — — 22 2 × 10⁻⁸ 3.2 — — 2 2 × 10⁻⁸ INH-control 10 — 4 18 2.9 × 10⁻⁶   ND: not done; —: no colonies

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We claim:
 1. A screening method comprising the steps of: (a) batch infection of host cells with fluorescently labeled M. tuberculosis mycobacteria; (b) removing free unbound mycobacteria; (c) adding compounds that are to be tested to a multi-well plate; (d) seeding said host cells infected with fluorescently labeled M. tuberculosis mycobacteria into said multi-well plate containing said compounds; (e) incubating said multi-well plate containing host cells infected with fluorescently labeled M. tuberculosis mycobacteria and said compounds; (f) fluorescently labeling said host cells; and (g) analyzing said multi-well plate using automated confocal microscopy.
 2. The method of claim 1, wherein the screening method searches for compounds that interfere with the multiplication of M. tuberculosis within said host cells.
 3. The method of claim 1, wherein the host cells are macrophages.
 4. The method of claim 3, wherein the macrophages are live macrophages.
 5. The method of claim 1, wherein the automated confocal fluorescence microscopy measures intracellular mycobacterial growth.
 6. The method of claim 1, wherein step (g) comprises determining for each compound a total host cell number, a percentage of infected host cells; and/or a percent inhibition of infection.
 7. The method of claim 6, wherein the host cells are macrophages.
 8. The method of claim 6, wherein step (g) further comprises analyzing the total host cell number to determine if it is high or low; and wherein (i) a low total cell number is indicative for the compound toxicity and/or of the unrestricted growth of M. tuberculosis inside macrophages; and/or (ii) a high (total) cell number is indicative that the compound is not toxic and prevents mycobacterial growth.
 9. The method of claim 1, further comprising the step of using control(s) selected from at least one of the following adding a compound with known anti-tuberculosis activity instead of the compounds in step (c) as a positive control; and adding DMSO or antibiotic control(s) instead of the compounds in step (c) as negative control.
 10. The method of claim 9, wherein the compound with known anti-tuberculosis activity is selected from isoniazid, rifampin, ethionamide, and moxifloxacin.
 11. The method of claim 1, wherein the M. tuberculosis mycobacteria are labeled with GFP.
 12. The method of claim 1, wherein the host cells are labeled with SYTO
 60. 13. The method of claim 1, wherein after step (b) an incubation with an antibiotic is carried out.
 14. The method of claim 13, wherein the antibiotic is amykacin.
 15. The method of claim 1, wherein the screening method is used for the high throughput screening (HTS) of large scale chemical libraries.
 16. A compound that interferes with the multiplication of M. tuberculosis within host cells identified in the method of claim
 1. 17. A compound that interferes with the multiplication of M. tuberculosis within host cells identified in the method of claim
 3. 18. The compound of claim 17, which is represented by formula


19. A compound that interferes with the multiplication of M. tuberculosis within host cells identified in the method of claim
 9. 20. A compound that interferes with the multiplication of M. tuberculosis within host cells identified in the method of claim
 13. 